MS Teams has quickly grown in usage within organizations over the last 12-18months. It's easy to see why - it's simple to use and ties into an organization's existing security policies very easily.
The only snag some people have with it is that when a lot of chatter is happening on a group channel important messages could be getting lost.
There are usually 2 ways to work around this.
We use MS Teams in work and after using it for close to 12 months it really has won us over from Skype. It did take a little bit to get used to the idea of 'conversation threads' and not just random chats but once you get used to it, you'll never go back
However, there is one issue that a few of us have run into where Teams would just keep showing the 'Logging you in' modal when starting up after we change our system passwords. This would happen even if you logged out of the current Windows session or rebooted the PC.