Amazon MCF: US Fulfillment

We have very simple use cases for this app, and it works very well. It has helped us to automate which orders get sent to MCF versus our other 3PL. We had some initial challenges with Onboarding, but a very quick call with the MCF support team, and we were off and running in a matter of minutes.

This app is relatively bare bones but is quick and works well.
Ideally I would like to see the following updates or improvements.

1. Ability to change MCF shipping speed after the order has been placed by our customer before it is submitted for fulfillment. If the MCF shipping speed was displayed the same way it is on customer checkout that would be great.

2. Display the cost of the MCF shipment in the Shopify order

3. Display the expected ship date and delivery date in the Shopify order

So far...pretty flawless!!

-Can see that orders are accepted/rejected MUCH faster
-It "appears" that orders are shipped faster by Amazon- as the early metrics suggest

I have been using the native Shopify MCF connection for about 4 years. Did the job pretty well with no major problems - and was FREE. Was about to migrate to a PAID MCF app, when I heard the Amazon was publishing an MCF- Shopify app. After using this for quite a few orders, everything is working very well - and again it is a FREE app.

One bonus is that when a single order is split into different shipments, this app NOW handles seperate tracking numbers in the same order. That means the customer is updated in knowing the different tracking numbers. Thus, support queries received about "where's the rest of my stuff" are pretty much eliminated.

Keep this app working flawlessly, and make improvements pls.

inventory count is not synching????!!!! please fix it asap!!! everyone did the switch and the fact that inventory count is not synching is a big problem after the switch!!!

Does not Allow to have multiple shopify accounts connected, you can only use one. the old method allows you to create fulfillment to multiple accounts.

This app doesn't really work at all with a merchant account that has multiple stores. It doesn't let you pick the right account, doesn't let you change things if it picked the wrong one somehow, tells you to disconnect the account first before trying to link a new one (but gives no way to do that), is buggy and doesn't let you connect products, etc. It's absolutely not a "best in class" app like they claim it is, even the wording on errors/messages is unclear.

It would be nice where a note is placed before downloading that the app only supports Amazon US seller accounts only!!
In today's market I wonder why Canada is not supported?