I'm loving it. I moved the NFB wire from 16 to 8 to open it up a little and it really sounds great. I was thinking of posting a SS100 vs variac'd SL->PS2 comparison. I'm surprised how close they can sound.
I just got cardinal's Tremoverb and it took me a minute to dial in but a little time (and NOS Sylvania 6L6s) and the orange channel sounds quite good.