I had the Mosfet version, currently own the Rumble 800 head. I say don't pay any mind to the "Bugera is Berringer and they are evil and copy and are cheap junk blah blah" pearl clutching. The amp I had was well-built, held up fine, and sounded good. That being said, the power is a bit lacking compared to even my old Rumble 500. I prefer the Rumble's tone more, but this is a tone preference and not a matter of one being "better" than the other. The Bugera is more modern sounding and smooth, the Rumble more vintage and has more "balls" to my ears. The gain and pad on the Bugera was my only complaint. The clip light seemed to always be on without the pad, and the pad was -15db which IMO is too drastic.