Well, I've had this thing for a week now and I kind of like it... First I tried it with an ukulele through an extremely crappy amp (please, don't ask why...) and was very dissapointed of how it sounded, it just added some noise and ugly distortion. Then I tried it with my 4-stringer through a real amp and it sounded actually quite nice and funky. After playing with it for a while, I finally took my 5-string fretless and my ears were pleased with distortiony filtering.
The filter itself is quite subtle, no instant funk found here, but with the distortion circuit on it, it's quite nice effect, just not extremely funky even then. The distortion is just distortiony, not fizzy or fuzzy or in any way subtle or gritty, just distortiony, and it's quite pleasing, especially when blended with clean signal. The blend knob adds bottom end nicely.
I like this thing a lot with my BSY600, the pedal I have overlooked for long. Smooth synthness is found especially when using it's octaved sawtooth, allthough i think I'd like it even more with an octaver that has better tracking... I'll buy myself Octave Multiplexer when I have money, and maybe a flanger, it would sound nice with this thing.
Next week I'll try this in band setting, I'll let you know how it behaves!