Comment by jon-wood

In the strictest form Teams "works". You can chat with people, you can do video calls, you can share files. Outside of the core "calling a person" experience though it's a mess, starting with the way the word Team is so overloaded, it has several different meanings within the Teams application. There's very few other places where its so apparent that a piece of software is bunch of other products all mashed together and shipped as fast as possible - you've got Sharepoint in there, Office, Skype for Business, and very little consideration seems to have gone into how to make all of those work together seamlessly.