Definitely going to try this out, as a few contacts and other designers have mentioned this!

Especially interested in their video call + whiteboarding feature. Out of curiosity, what are the different use cases if/have you used this for?

A lot of my workflow at the moment has been screensharing across Hangouts/Zoom and driving the software on my computer while getting audio input from others on the call. If/when someone has an idea or visual input, it's usually stopping to let them screen share while they hobble up their sketch/idea.