had a little play last night :)
i put it through an Orange 4x12 with V30's. started with my Gibson Explorer with stock 500t/496r pickups. in AFD mode this translates to a huge riffing sound and a smooth, saturated lead tone. endless sustain, morphing into easy and (usually) toneful feedback. you suddenly have the sound you've heard your heroes use, with no need for any pedals. #34 mode is more like a JCM800, which of course it's modelled after, but with more gain. definitely easier to get your classic rock sounds in this mode. AFD mode is completely addictive, but in the long run i can see #34 getting plenty of use.
i then switched over to my 1970 Les Paul custom. remarkable difference! it was suddenly a higher gain vintage Marshall! the lower output pickups made for a fair drop in gain. i generally use this guitar with my 70's JMP 2204, which is an amp i totally love. the AFD doesn't have the same dynamics, and doesn't clean up the way the older amp does. in fact, it doesn't clean up very well at all! they both sound like Marshalls, but from different eras.
so my only complaint is the lack of a clean tone, volume reduction just doesn't work that well. the power scaling is brilliant, full on roaring amp at whatever volume you need. the only problem with that is i now NEED a YJM100! :)
i figure i could use an A/B pedal and put another pre-amp into the effects return, if i really need cleans.
the next thing is to try it through my Vintage Modern cab, with greenback re-issues.