The UI needs more work. For some reason my recent contacts persists in showing me people I haven't chatted to very much. It's also not immediately obvious how to find a contact, despite how frequently I have to do it. And why can't I just right-click a contact (or a selection of contacts) and then 'Start conversation' or 'Invite into conversation'? Adding someone to an existing video call is more convoluted than it ought to be.
But when you work out how to get it to do what you want to do then it's fine and it seems quite capable of handling three remote contacts in the same video call which is good.
I just wish it was a little more intuitive.