Get this + a looper pedal and a real drummer and you've got yourself an instant power trio!
I've seen this one on ebay many times, and I've been tempted. 99% of all of these double necks you see are either 6/12 guitars only, or guitar/bass but with a single output. So idiotic. Who's going to run their guitar and bass through a guitar amp?
This one gives you two outs (which you can't really see in the photos), so you can run out to guitar and bass cabinets separately.
Two reasons I haven't picked this up yet: I'd prefer a 4 string fretted bass side, and I'd rather have the bass on the bottom half of the instrument. I have to wonder how it balances/weighs too.