I've had one for a couple weeks now. Thought I'd share: Great sounding amp. I've had it out on two gigs - one cocktail hour with a pianist and loud guests - and one small cafe with a quartet: pianist, sax, drums, me. Came through nicely on both occasions. The quartet gig got slightly hard hitting at a couple points and it hung in there with the master up about half. It's not pushing a ton of lows of course but it doesn't sound thin at all either. I was using a Full Circle with a Fishman BII preamp. The pickup is not able to drive the preamp fully (can't light the clip light). It does work without it and can get some decent volume but it's much louder and fuller with the pre. My passive electric basses are able to drive the preamp fully. It was great to pack it in a small shoulder bag and sling it over my shoulder at the end of the night. Besides small gigs I bought the double four to use as a practice amp and it shines for this as well. Practicing with headphones is great - very nice sound - much better than the mackie mixer I was using. Playing music through the speakers from the aux in is just ok. The speakers are voiced for bass so it doesn't sound great for music playback (and wasn't designed for it obviously). It's not going to replace my $20 computer speakers. It does have an external power supply which I'm not crazy about. Also it's a bit bigger than the website says with a 11" length - not a big deal but good to know.