Here's the problem with EQ pedals in my opinion: They're either barely making an audible difference to your sound, or if they do, the frequency change feels unnatural, like bad plastic surgery. This pedal, however, is absolutely tremendous and doesn't get into either of those pitfalls. I own a Mesa Mark 5:25, which allows for drastic EQ changes that feel extremely organic, and this does as good of a job, and actually, I would say, even better, because any useful frequency can be reached due to the parametric sweeps available. This pedal should be the number 1 most popular EQ pedal in my opinion, hands down. You have this frequency in your head that you want to cut or boost? Well, now you can find it and do it, and it will sound exactly like you hoped, and even better (of course, provided that you have a good speaker and a decent amplifier). Absolute must-own.