Amazon MCF by ByteStand

Feedback we would like escalated to your product team

We want to be direct about how this reached us, because we think it is a design problem rather than a mistake on either side.

Enabling Flex is a migration, and the app does not present it as one. It replaces the fulfillment location, leaves Sync permissions unapproved, and requires a Rate Card that exists nowhere in Shopify — three separate setup steps, none of them obvious. In the interface it reads as a tab you can look at, not a change that reconfigures how the store fulfils orders.

There was no warning at the point of enabling. No confirmation step, no summary of what would change, no list of what had to be set up afterwards. We would ask you to open the app yourself and look at how this is presented — from the merchant's side it is genuinely unclear that clicking through commits you to anything.

And once enabled but unconfigured, nothing in the app said so. ByteStand continued to report as connected and healthy. There was no banner, no incomplete-setup state, no error. The only visible symptom was in Shopify, days later, and it took us fifteen days to trace it back to your app.

What that cost us: fifteen days with no order reaching Amazon, twelve consecutive days in which not a single customer could complete checkout, twelve orders created by hand in Seller Central by our customer service team, and customers left without tracking information. We found it because a customer complained — not because any system told us.

On the 2025 emails: we understand they were sent, and we do not doubt it. But an email campaign from eighteen months ago is not a safeguard. The person who received it may no longer be at the company — that is exactly our situation — and the setting remained one click away for whoever came next, with no warning attached to it.

What we would ask for:

A confirmation step when Flex is enabled, stating plainly that it is an upgrade, what it changes, and what must be configured before fulfillment resumes.
A persistent in-app warning while Flex is enabled and setup is incomplete.
Alerting when inventory sync stops or order submission fails.

We are glad to be running again and your support today was genuinely excellent. We are raising this because the next merchant to click that button will lose the same two weeks, and they may not catch it as quickly as we did.

Thanks,
Andrea Lorca — E-commerce Lead, Boba
andrea@makeheroes.co

Very disappointing experience.

Be aware that the price shown inside the app is not necessarily the price you’ll actually be charged.

We also learned that if you disable a market, the pricing does not automatically return to the original price, even though the app may show that it has.

This resulted in us overpaying around $400. Customer service offered very little help beyond an $80 refund.

Misleading pricing and poor customer service.

Let me start off by saying that I didn't mind paying $85 a month for this app because of the customer service. There are many apps on here that are much cheaper, and Amazon even has a free one! I'm a very busy business owner and dealing with customer service agents can be a very time consuming task. Cara is great! The problem is, she's not always there. She will be there on chat, but when chat's not available you get this other agent named Todd. He's rude, condescending and quite unwilling to help. It's a complete 180 from Cara. I'm not sure if I'm going to continue using the app, but if I don't, it won't be because of Cara. Why would anyone want to spend their hard earned money with a company that treats their customers this way?

*I will gladly change this review to 5 stars if/when this issue gets sorted as I hate leaving anything but 5 star reviews. But after a total of 7+ hours on the phone (conservatively) with staff from Shopify, ByteStand, and Amazon, and still not being able to get this app working as described, I feel this is a fair rating based on my experience; I am sorry.

CONTEXT:

The gentleman at ByteStand was very nice and professional and we trouble shot via shared-screen a lot of possible issues until everything seemed to be done correctly. However, allegedly I am still unable to fulfill international orders via ByteStand on FBA Export Eligible inventory. I was told that this is an Amazon issue, not a ByteStand issue in spite of my inventory being FBA Export Eligible.

While on the phone with Amazon, they are told me that they do not allow "non-media" products to be internationally fulfilled via 3rd party fulfillment software, so there is a massive discrepancy here in what ByteStand FBA says they do vs what Amazon is telling me.

I politely insisted that they were incorrect and escalated this case all the way up to Catalog Captive Team and then escalated it again to "Leadership" (with screen shots) insisting that this app should be working and that it was set up properly and that the problem must be on their end. The case is still open. However, I expect Amazon sweep this under the rug via ninja-closing-the-case-on-the-down-low and/or ninja-merging-the-case-with-an-unrelated-case-closed-weeks-ago which leaves me pounding sand for the last 2 days.

Besides the app not working properly for me, the people at ByteStand were very nice and professional.

DO NOT WASTE YOUR TIME IF YOU HAVE INTERNATIONAL ORDERS (in different regions of the world)! Note that if you are in the US and want to enable Amazon FBA Fullfillment you can't do it for international orders. Which means if you get a mix of orders, you can only have Amazon fullfill the orders to US addresses and not international but the whole thing breaks down because you can't just fullfill them yourself...the customer can't check out internationally!

So frustrating to spend hours because it says "Amazon FBA fulfillment both in the US and abroad" but after hours and then speaking to them on the phone, they told me it wasn't possible. And you can't simply choose to fullfill the International orders on your own as it can only be Amazon 100% or you need to install and pay for Locksmith and clone all your products and then have those be only available internationally....

Either way this product won't let you fully outsource the fullfillment! So frustrating!!! You really need to change the messaging!

The customer service is very supportive and answers all my questions, however as the app doesn't have dashboard and SKU mapping table, I am doubt if it would run normally everyday, I don't want to know the problem only after my customers experienced the problem, so I delete the app within the trial period.

UPDATE
The 90 day free trial was a promo made available by the company, I was not "given" it as a gesture by them. Seems like they're annoyed that offer existed! The company's response exemplifies the attitude you will experience. Check out other critical reviews to for much of the same. No response on the bugs either, so I guess that should say enough!
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Cara is a wonderful support rep that's conscientious and hard working, any issue we ever experienced that she could help with was resolved by her speedily, with care & true professionalism.

Unfortunately, I cannot say the values of the company. We rolled past our free trial by a total of 4 days over the holiday period and therefore fell into a paid period.

After experiencing a few bugs and gaps in the product we had already stopped using it, we asked for a courteous refund but the company refused even though it's clear we'd stopped using the app before this date from our usage logs.

Bugs & holes include:
- inventory update feature not correctly updating which cost us a few days in sales as it would keep marking products out of stock - painful in Q4
- unable to remove markets from billing without the developer
- pricing updates only match list price, not sale price of amazon listings - made this function impossible to as the primary function is to match up Amazon sale pricing to shopify store

Ultimately given we didn't use the product for those 4 or so days & one of the paid features didn't function correctly throughout, it would have been reasonable of the company to refund.

I would be glad to remove the negative areas of my review if this can be resolved.
I'm not sure that $100 is worth souring a relationship.

this app is not transparent about their pricing. I had to spend a lot of time using it before i could figure out how much it was actually going to cost me. It the end, this app would cost me 4x the price of other apps i've already used, that do the same thing.
Frustrating because it's just a waste of my time.
Make a good product and be transparent.
Pricing is only visible once you’re connected everything and spent time setting it up.
It took a long conversation with the chat agent to even figure out the costing.

“Starting at 25$/markletplace would” might be a transparent way to communicate.
No need to obscure the pricing. It just makes you look bad.

I can not recommend the app and especially the service provided. We have a running shop and implemented the app. First we never, after several tries got a full setup from the guys. We asked them several times for a detailed documentation about the linking. They couldnt provide and just showed us one crappy video. Then we had some extended requirements about EU wide shipping and different charges. Its not supported. If you sell FBA and FBM you will get in a lot of trouble. Then we deleted the app and all the settings were broken. Just a big mess up. Just to let everyone know. Its a very crucial process with the app and the support is really bad. Thats a reason I wouldnt go for these guys. How can you offer something like this and not even provide a complete documentation for a setup?! Thats in no way professional. And then you get one reply every day. Good luck to get this running.

All the necessary features are extra paid. Don't waste your time as it's not worth it.
Stock sync - 35 dollars, orders sync 25 dollars, app 35 dollars... big no!