I was playing with WinBoat yesterday. Its pretty cool. Yes, very light and seemed to function very well.

Navigating around is...unique... As you are accessing folders via 2 OS structures, so not as seamless as in workflows but nothing is really in the way. But counter argument is that running a standard windows VM is not really any more of a hassle.

I'm more concerned with the windows privacy aspects while it runs, but to get into it I need to activate windows which I'm not going to do for a testing scenario.

It's far too early to have an opinion on it though, so I'm equally looking forward to what a year or two will bring.