I have one, I got it when my ancient Fender Rumble 60 started to hatch gremlins. The weight (or lack of) sold it to me immediately! It's not as loud as the Fender, but has a nice growly tone with a dab of the 'spectralflump' or whatever the hell it's called. Build quality seems nice - (I took it to bits for no reason like I do with pretty much everything I own!) time will tell on the durability front. I use li'l combos as monitors with the PA doing the out-front work, so the on-board DI gets plenty of use, and I like the 'post FX' feature.
It ain't loud, though. Of my 2 regular drummists it's fine with the one that likes to frequent jazz bands, there's even a bit of head room. With the Bonham fanatic, however, it's like it's not even on, even at full throttle. I had to buy a cheap 1x15 combo just hear literally anything!