Communicate quickly and efficiently.

I actually have not used MS Teams support. I'm giving a 7 as I'm guessing the support would be reasonable if you were a larger organization and fine for smaller organizations. That might be a good sign that I've never used their support for the product to just work well. I think I would use their support if I tried other features like the apps you can add in, file sharing if it didn't work as expected the first time, etc. The chat and screen sharing really works well for the 3 of us.

Teams works great for anyone who has Office 365 with other users in their organization. It is nicely integrated with Outlook to quickly create internal and external meeting requests. You can see all your recent files. You can request to take over another persons screen and control it. Video works great to easily have a virtual meeting to make everyone feel part of the meeting. I like being able to ping someone quickly throughout the day.
It is interesting how I end up using the tool the most of the people I communicate with use. Slack and Teams have been the 2 main tools I've experienced using. For doing demonstrations, online meetings, I've gone between Zoom (my favorite), GoToMeeting and Teams. If I want to have the presentation go as smoothly as possible with people joining easily, sound working, then I use Zoom. If it is only a couple people from a current customer, then I'm fine using Teams.