This is one kickass pedal. It's a one trick pony since it doesn't have the vibrato function of other vibe pedals. But it nails the vibe effect as well as any of the boutique pedals that cost twice as much or more.

Lots of people comment on its lack of transparency, and claim it sucks tone. They also say that there's an adjustable trim pot inside that fixes the problem. Maybe, maybe not, all I know is that mine leaves my basic tone untouched and adds gorgeous swirling and throbbing to my sound. Maybe there's sometimes a difference in the setting of that trim pot when purchased, but based on my experience I recommend this pedal to anyone looking for either a Bridge of Sigh or Machine Gun sound.

This pedal does rock.
About the tone suck.....
I think it has something to do with the impedence. If I put this pedal BEFORE my delay pedal, it sounds like crap. If I put it after, it sounds great. I discovered this by accident last week.