i had a BH-2 before and it rocks coz:
1. It works great with dirt pedals.
2. I like the boost para sa mga accent notes.
3. Built like a tank.
4. Pot-less so no scratchy sound.
5. Auto by-pass, pakawalan mo lng and by-pass na. unlike dunlop/vox wah na kelangan mo pa apakan yung switch at minsan may poping sound pa.
6. you can almost get the sound of an envelope filter sa dali mag toe down.
although i love this pedal meron din naman down side ito:
1.wala siyang mid sweep which is what im really looking for in a wah.
2. the contour knob doesnt make any significant contribution coz i can barely notice the changes in the sweep. (or maybe its just my untrained ears).
3. The casing itself is built like a tank, but once the pivotal point of the wah gets f***ed up... damay narin yung LDR (sensors). hindi naman sa masisira yung LDR but the alignment of the "flippers"
(which serves as a gate of signals between 2 perfectly aligned LDR's). and pag nangyari yun mag bby-pass kagad yung BH kahit nakatoe down ka.
4. if yung LDR mo yung nasira. you have to get the parts shipped from us para lng maayos yan as compared to the convenience of getting a regular pot.
I hope my review can help you in some way or another... goodluck!