I tried it after listening to Bryan R. Tyler's clips. I loved it right away, but I foolishly convinced myself that I probably wouldn't use all of those cool and unique sounds, so I returned it (returns are fast and easy with Select Sounds). I tried a few conventional-type filters, and realized my Qballs and Spit Wah already cover the classic Mu-Tron III tones. So I bought the SA BEF again, and got the free Hot Hand with it. I'll never part with it again! I also have the Multiwave Distortion. Definitely try the BEF; if you don't like it, you only lose the return shipping cost. Source Audio is clearly committed to making pedals with sounds that are unique AND usable, and you get serious bang for the buck. Sorry for sounding like a commercial for SA, but their pedals are THAT good.