Feature:
Reverb is beautifully rich, when it works. I've had serious problems with the spring getting knocked outta whack. It's sporadic but madening. Truthfully this is a bit of a delicate amp. Things seem to shake loose? It comes with a channel/reverb footswitch that also works sometimes. I've had this problem with Fender footswitches too.

Quality:
see above. Delicate.

Value:
Classic tone, classic price

Desirability:
Totally different. You dont see too many players with Ampeg 6-string amps. And this thing is f'ing georgeous. Silver face, blue old-school vinyl! shweet. Even the knobs are cool. Put this thing next to your co-guitarists Marshall and you will like a stud.

Sound:
I've owned this amp for 5 years. For the money, it's a great value by tube amp standards and it has a unique character and pretty if one-dimensional crystalline tone. Great for clean Jimi style lead/rhythm. Nice dirty overdrive. This is by no means an amp for serious crunch or those players who require a thick bottom end. But for clear punchy classic toned it's a great alternative to much more expensive tube rigs.