I got one of those too. But you can better name it acoustic BG. When playing as an upright it's hard to keep it in position because it lacks support. Also it's a pitty that the body isn't curved enough to use a bow. So it's a fingering instrument only.
Amplified this B10 sounds really wonderfull. Acoustically the sound is tight, but not loud enough to be able to cope with an acoustic guiter for example.
Here you can hear how it sounds amplified (this is not me by the way) from Dutch tv:
http://www.youtube.com/watch?v=JWEJnPz7mcs
And this is me at a gig somewhere in Friesland:
http://www.youtube.com/watch?v=RByNH2MTJQg