Feature:
The only complaint might be that I think a foot switch should have been included for the price. I'm not really using this feature, however, so it's no big deal. Also, the amount of output options on this amp is incredible. Probably more than I would ever need, but it's nice to have them available.
Quality:
I've only had it for a few months, but it seems to be built very solidly. I've got it mounted in a ten space rack which took a spill from the top of a speaker stack during a show (from the massive low end vibration and poor stacking on my part). I finished the set with this amp laying upside down on the stage and it never hesitated at all! The rest of the band and the sound engineer didn't even know anything had happened!
Value:
I guess this amp can be a little pricey for some (myself included), but you get what you pay for and I feel this was money well spent.
Sound:
Great sound quality and versatility. I'm using this amp for hard rock/blues, and could not be happier with the sound. Especially with the gain cranked up a bit for a little "growl".
Support:
I've heard that it's good, but I've had no need to contact them yet.
Overall:
I'm completely happy with this amp and don't have any plans to replace it anytime soon! I've heard some people say that the power rating on this amp is overstated. When used in the biamp configuration, it does seem a little quiet. But, when used in the bridged-mono setup, this thing comes alive!!