Shopify Marketplace Connect

Be veeeeeeeeerrrrrry careful if using this app for the first time to connect to your existing Etsy store with active listings.
We previously used a different provider to connect our Etsy shop and Shopify store, and had 300+ active listings in our shop. That provider charged $50+ per month, so we decided to try this app due to the lower cost.
Added the app to our store, connected our Etsy shop, and allowed it to automatically match up our existing Etsy listings with the corresponding products in Shopify.
Without us setting the app to make any changes to the existing listings, it automatically did the following to EVERY SINGLE listing in Etsy upon linking the Etsy listings and Shopify products:
1. Overwrote every existing Etsy product title with the Shopify product title
2. Cleared out every single Etsy product attribute and product tags for every listing
3. Reset the prices on every Etsy listing to match the prices in our Shopify store
4. Changed the Etsy category for every listing to 'Accessories'
5. Changed the units of measure for product size and weight from imperial units to metric
Additionally, it began automatically creating Etsy listings for every Shopify product that didn't already have an Etsy listing linked via SKU. This resulted in about 60 unwanted Etsy listings being created (and 60 additional listing fee charges from Etsy). It also marked every new listing as a 'Featured' listing in our shop.
Essentially, the app has completely DESTROYED our Etsy shop, which had over 3000 sales, an average 5 star rating, and many followers that consistently reordered from us. In addition to the costs from the unwanted listings, we are also losing hundreds, if not thousands in sales revenue, and incurring an extreme amount of labor as we have had to put our shop on vacation while we manually rebuild over 300 Etsy listings one by one.
BE VERY CAREFUL WITH THIS APP!

Seems to work okay for Amazon but it was terrible for Etsy. The attributes were not synced to Etsy and actually overwrote the information in my listings with incorrect details.

The integration with Etsy overall seems very buggy. I kept getting error messages, e.g. because in the app I could enter any value but Etsy only accepted values from a dropdown menu.. This menu should be visible on the app!!!

I leave two stars because Amazon worked okay (although I only used the offer sync -not the product details) and the customer service was available and at least trying to help.

This app is not ready for prime-time ..seems like it's been rushed to release to cover for the fact that the Walmart-Shopify app is going away. The good news is that it is cheap (so far) and you can choose which listings to "enable". I'm just using it for Order management as I have zero faith it will work for listing or inventory management. Seems to me that they are just trying to do a copy/paste on what might have worked with Amazon. Documentation not updated for Walmart. Here are my other commments:
Can't handle marketplace cancellations ..won't backflush to marketplace cancelled order. Has no import/export capability - have to use their "grid" which doesn't allow you to sort or filter on anything meaningful. Can't easily map when you have hundreds of listings ..can't get rid of Amazon connector screen (I don't want to sync with Amazon - get rid of the pop-up screen that shows up every 10 seconds) I could go on ..but it is cheap so I'll take it for now BUT PLEASE MAKE SOME IMPROVEMENTS and I will be happy to raise my rating.

I really wanted to love Codisto. It has a huge potential. The ability to work on multiple products at the same time from within Shopify (instead of syncing to a different server) is great. The ability to map every field as I see fit, support of metafields and even formulas is great. That's the reason the app gets 2* instead of 1 (or 0).

But unfortunately, it did not work for my business for multiple reasons. First of all, it's very buggy. Following the help pages, tutorials and initial instructions provided by customer support did not work for me. I have thousands of products already listed on Amazon and Shopify and Codisto was supposed to seamlessly link them based on SKU and UPC. On their website they say "follow the in app prompts (including relinking any existing listings which can be done quickly in bulk)". This could not be further from the truth. All of my SKUs and UPCs match my Amazon inventory but still every product I tried to link required several additional manual changes (which the help pages say are not required but support, after escalations admitted they were). And then after taking 3-5 minutes to link ONE product I get an error message from Amazon.

Over and over, whenever I had an issue where something wasn't working as it should have according to their help pages, reaching out to support and having them take sometimes a day or more to respond yielded an instruction or clarification that completely contradicts their website, help pages and in-app help. Moreover, asking two support agents the same question produces a completely different, many times contradicting answer. The app says that if you disable the link between Codisto and Amazon for products that were not published by Codisto, only the link will be disabled. In reality (and what customer support told me after the fact, disabling a product on Codisto will not only delete your offer on Amazon but even the catalog page for the product itself - thus losing your BSR, reviews and any marketing efforts. Even on non-technical questions like how much the product costs I got 2 different responses from customer support, one of which contradicts the website (the websites says that plans are by listing, not SKU but the app says it is per SKU. One support person told me to trust the website and another told me to trust the app. When you sell clothing products, each with 20-40 different variation SKUs, this means a HUGE difference in price!)

To summarize, Codisto has a huge potential and may work for businesses that either haven't started selling on Amazon and eBay or have a few listings. If you already sell on Amazon and have many SKUs, or if you don't feel like having to beta-test a software with no reliable customer support or documentation, Codisto is not for you. I may give it a try again in the future if the software starts working the way they say it should.

I just spent an hour and a half setting up the first two products for all 5 Amazon marketplaces we have properly connected. After an hour and a half of work, I found that my work is not saving. Title, pricing, product category, tags.... this is desperate. The app is paid, so one would expect these basic functions to work reliably.
The app works as poorly as the previous app from Codisto, which I tried and uninstalled after 14 days. It's the one that only allows connection to one marketplace.

The interface of Codisto is integrated inside Shopify. While this might have advantages we found that it was difficult to work and navigate through the app.

Then, the app modifies the theme when installed. Even after uninstalling it some traces of software remain on the code so make sure to manually remove them.