fender FM15 DSP

I'm wondering if anyone has any opinion on this little Fender practice amp?

I'm intrigued by the idea of an amp that can pretend to be several different "classic" amps.
Do the modelled sounds sound decent?

I've fonnd one in a pawn shop that looks like it's in pretty good shape, for a decent price.

But given that it's a pawn shop, the return policy isn't especially friendly, so I'd like to hear a few opinions before I make a decision.