Yes, we are doing this, but it seems (to me as a user), that Skype is easier to use than Teams. I have only been using Teams for a few months. FWIW, I have been able to embed SmartSheets, OneNote into it. And we have done some Meeting via Teams. Meetings still seem better to me in Skype. I will have to pay more attention the next time I am in a Teams meeting.
BTW, this would have been a good question to ask in a Poll, so we could get 5 points instead of 1 for replying, LOL.
We migrated to O365 in general this past year, and SFB was part of that solution. It's been a vast improvement over our previous collab solution.
We're already using Teams internally to IT as sort of a familiarity exercise/POC, and thus far it's worked well. I'm not sure how the garden-variety business user will fare, but what we found with SFB that high-frequency users got accustomed pretty quickly. We drafted some good instructional docs that we believe helped smooth that process.