I'm sort of re-discovery compressors after years of not using them. I have a couple and have tried others, and here's how I would describe my experience: Keeley Compressor+: the noisiest (of the ones I have experience with), and makes a pronounced popping noise when switched on and off. Otherwise, sounds excellent and has a nice playing feel. I would use this always if not for the hiss. Keeley Tone Workstation: the compressor on this thing is supposed to be based on the regular Keeley Compressor, but it sounds and feels nothing like it. Sure, it's noisy, but it also has incredibly uneven attack to boot. Definitely not for me. Seymour Duncan Visegrip: less noisy than either of the Keeleys, and has a nice sound to it. Doesn't quite do the country bend thing (EQ-wise) as well as the Keeley + (it's not meant to). Definitely smoother sounding, though. Footswitch makes a very slight pop when engaged/disengaged. Wampler Ego Mini: Closer to the Keeley in sound and much less hiss than any of the others. Very noticeable pop when engaged/disengaged, but not as bad as the Keeley. I'm actually very surprised and impressed by this pedal. I've also owned some vintage MXR pedals back in the day, but it's not really a fair comparison since those tended to distort with heavy picking. Technology seems to have come a long way. In fact, the older MXR is probably why I stopped using compressors in the first place. So, how does your experience stack up, especially with respect to noise? Any compressors you are particularly impressed with?