Shopify Marketplace Connect

My experience with this app has been absolutely awful. If you still have Codisto, DO NOT move to Marketplace connect. I moved over 5 days ago and was told the transfer would be essentially be "seamless". I haven't had any active listings on Amazon since i.e. no sales. I've been on their Livechat twice a day every day, I keep on being assured that it's with their engineering team. No fix, no timeline. NOTHING.

DO NOT TRANSFER FROM CODISTO

The worst possible connector app... you think everything goes smooth and then BOOM all your listings on a marketplace get deleted and nobody at support knows what to do. There goes years and years of work. HIGHLY RECOMMEND GOING TO A DIFFERENT APP.

This app was so bad we deleted it the day after we went through 2 support chats and nobody had any clues how to help.

It doesn't work properly.
I have connected my Shopify with eBay account and some of the items on Shopify have sold out but they are still showing as available on eBay.
I have deactivated an item on Shopify and manually removed it from eBay as it did not get removed automatically and it kept getting re-listed for some reason so I had to keep removing it until I was forced to permanently remove the listing from Shopify to stop it from being re-listed on eBay

We installed this app to connect Amazon and Walmart marketplaces to our Shopify store. Unfortunately, we were unable to link our products. We opened a support case on the 15th of July, and despite assurances that Marketplace Connect's developers were working to fix our issue, almost a month later and we still have not had a response.

Shopify Marketplace Connect is holding back our business due to poor support, forcing us to look for alternatives.

It was working perfectly fine until they changed us to a new plan without notice or authorization. Now they say we have outstanding charges and ended up closing our account due to that.
Now we have unhappy customers because of delays this has caused.
Find a different app. People at this one are shady.

Was working OK,( the shopfiy makeover after they absorbed the app was a complete disaster ), but now our inventory is not syncing for days - we are now overselling 6-8 items on ebay everyday. They have been unable resolve the situation for several weeks now. We have to scramble to restock items, or refund purchases. Hours of our time wasted, and we look like amateurs who don't know how to run a business. And it is not cheap. Looking for alternatives.

This app takes an hour to transfer orders from an external marketplace to Shopify. By that time suppliers can be sold out of the purchased items. I contacted support and they told me on two separate occasions that the unacceptable lag time was fixed. They lied to me to get out of actually dealing with the app problem. They are unable to fix the app to work efficiently. This app also disconnects randomly from sales channels and drops orders. It takes weeks for the developer to fix any issues. This is by far the worst app and support in the Shopify app store.

I was forced to migrate from a perfectly working app to this "new" one, and it's been nothing but problems ever since. The lack of support is infuriating and unacceptable.

My main issues are:

I cannot see my products.
I cannot link my products.
My entire shop is out of sync, and I don't have the time to fix problems that this app caused.

Please fix my shop immediately.

Had to migrate over to connect after codisto was discontinued. The negative reviews were spot on. My steady Amazon sales are gone. Most of my listings went to error and are now inactive. It's a complete guessing game how to correct. Hours with chat and on phone with Customer service. Got brushed off by service tech. Said I needed to escalate my issue to another department and I would be contacted via email and call within 24 hours. Neither happened. Marketplace Connect is not easy and not for people without extensive training. Even the Techs at Connect can't get my Shopify listings to connect to Amazon

It does not respect inventory rules or quantity. I keep getting orders for items that have been sold out or that are in locations that do not support online store selling. I have tried getting a solution from their support team and have waited for 3 months for a solution and they have stopped replying to me. I am a software engineer and understand why the inventory system is failing, and have explained to them in detail the use cases how to fix this. They have yet to get back to me since January. @Shopify can you find a better partner to fulfill marketplace connections or develop it yourselves?