[maturz]

I've been using teams since launch, it's a step up from Skype for business (mostly, they have for some reason decided to drop support for talking with regular Skype). I would say tho that they are still lacking a lot of important features. You can see a lot of examples of this here:

https://microsoftteams.uservoice.com

They can also be very slow getting around to fixing things even if they are very important. They only just recently fixed so status works and notifications stopped working for more than a week without getting fixed (patched this week).