Ask HN: Microsoft Teams Experiences?

What kind of experiences do people have with ms teams? We use it at work and I and many of my co-workers have noticed many issues: notifications doesn't come through, chat rooms are hidden (requires to collapse and reopen a team to see all the channels), some teams are completely hidden on some clients (e.g. hidden on desktop, visible on mobile), loading message history is _slow_. Plus what I find really annoying is that they don't have a proper linux client. Yes, the web client works but is missing important features like one-to-one calls and desktop sharing. Not having desktop sharing (even in conference calls) is quite a huge thing for a software developer that is working remotely.

What are experiences on HN regarding MS Teams? What could I suggest to my company to use instead (management is quite fond to ms teams since we used hipchat before and it was hard to organize stuff there)?