Just noticed this unit at the guitar store last weekend...there was a guy plugged into it cranking out some pretty cool sounding riffs. Is this thing the next step in the evolution of modelers, or is it a bust? I've got a $300 Guitar Center giftcard I received for Christmas burning a hole in my wallet. I'd like to hear from any of you folks who have owned or played through one. How are the tones? It would sure lessen my gear load for gigs.