I won't trust Microsoft to make the Mac version of this product as good as the Window's version. There is a long history of Office development that supports this conclusion. If you use Mac in your workplace, probably best to stay away from MS stack
I have used Teams for a few months on Mac and Windows (most time spent on Mac), this is the exact same quality: thanks electron.
Our small team within a giant org is using hipchat, but it's near impossible to get anyone else from the org on there for shared projects. Maybe they'll be more receptive to MS Team.