i got the behringer tremolo yesterday, mostly to get more familiar with the trem sound. my intention is to use it for recording, and $30 was all i had on me. i tried it on my sx sjb75 thru a hartke 2500 and an ampeg pb110. still have to try it with my tbc m5er my review: the battery compartment is like digitech pedals (you have to take off the top foot part by pushing in two knobs on either side), but more annoying. after about 15 minutes of trying to get the pedal (the manual said to use a ballpoint pen), i just decided to go DC. sound wise - it's decent. adjustable rate/speed, depth and wave (square or sine, i believe). trem comes through really well. so...depending on your opinion of behri products, it's pretty much what it is - a tremolo with decent sound. it ain't voodoo labs or a pulsar, but....for $30, it does what it can.