I had one. was FJA modded twice. being a single channel with 5 "mode" switches, the trick is to mod it so that all modes sound good. Jerry did a good job as usual. then i took it back and had him pick the mode that would be best for making an uber meets roadster sound(cactus mode) then i told him to forget all the other modes. wow!!! brootalz!!!! super angry sound. as far as features, theres the 5 modes, you can only select two or three(i forget) to switch between with the foot switch. switching to 6l6's made me much happier with the sound. I remember there being some gayness with the tube sockets that are stock on these things too. enormous transformer on the one end, other is pretty close to it makes the head flop one way, total wrist breaker to carry. heavy as hell.
For what you get, and what they want for it......if you want plexi or JCM800 from peavey, buy a windsor and send it to jerry(they are great once worked a little) if you want a flavor of heavy from peavey thats good stock or modded, then get a 5150/6505, JSX , or XXX.