Feature:
The graphic EQ and Contour controls are what make this amp. You can keep it flat or shape it every which way. The built-in 15" speaker sounds good. I do wish the extension speaker and lineout jacks were on the rear of the unit.

Quality:
Seems very roadworthy; it's been moved around quite a bit and is in fine shape. Well-built. The front panel has a strip of plastic which indicates what knob does what, and I could that plastic strip catching on something and breaking. But every other part seems solid.

Value:
It is less expensive AND sounds better than the 120w Hartke Kickback15, and other comparable amps are all $100 higher (or more). The updated version (BFX100 - has built-in effects) still sells below its competition.

Desirability:
I wouldn't consider this a 'sexy' amp. It just sounds good and is reliable. It's certainly not ugly at all - but it was price & sound that hooked me, not visual appeal.

Sound:
On its own, this amp sounds really good. Add a 4x10 extension cab, and it sounds great! Works for heavy rock, prog, fusion, pop... handles every bass we'vethrown at it (AND a Chapman Stick). It is loud enough, provided you're not competing with multiple Marshall stacks.

Overall:
Perhaps one day I will replace this with a different configuration (more powerful amp, separate 15" cab). But I'm in no hurry, since this thing sounds great and works in every context I've used it in; it's just as likely this is the last bass amp I ever buy. I could also supplement it. The preamp is what makes it, so I could easily purchase a power amp to get more clean power while retaining the tonal character. I'd only do that if I found it absolutely neccessary.