Sounds fantastic. I haven't heard a lot of high-end tremolo pedals to compare this one to, but it is leaps and bounds better than the stock TR-2. The stock TR-2 would drop volume and bass response when engaged... Robert Keeley takes the Stock TR-2 and swaps out components that bring back the bass response and also increase the high-frequency response too so you get more of your actual sound coming through. The then adds a volume control that sits on the same post as the depth, so when you engage the pedal you could potential boost your volume a great deal while starting in with the sweet tremolo. ...I love the Tremolo effect and I really love that my tremolo-ed sound is now thick and rich.
[Dr. Confusion on Harmony Central]