It is a true-bypass pedal, so if you don't need to use it on a certain song, you can bypass it without affecting your guitar's tone! And yes, when on, it truly does not color your tone....ABSOLUTELY TRANSPARENT, and that is the beauty of this pedal, you get YOUR TONE without any added noise or B.S.!!! And by the way, this pedal works wonderfully for bass too! No B.S. !!!
My other effects pedals are a vintage ROSS R-70 phaser/distortion, vintage BOSS CE-1 chorus ensemble, vintage MXR M-117 flanger (not the crappy re-issue), Boss DD-2 delay, Morley JD-10, Digitech Whammy and Morley Bad Horsie 2 Wah (soon to be replaced with a Teese Real McCoy Wah) in front of a 1993 Peavey 5150 block logo amp (with JJ tubes), with a Furman PL-Plus series II, TC Electronics G-Sharp multi-effects, BBE 482i sonic maximizer, dbx 266XL compressor/gate (used for gate function only) and a Digitech TSR-24S multi-effects processor (rarely used) in the effects loop. Also have a Marshall AVT-50H amp head for a backup.
My guitars are...1988 Gibson Les Paul Standard, 2004 American Fender Strat Deluxe with Samarium Cobalt Noiseless pickups and Warmoth compound radius neck, 1998 American Deluxe Peavey Wolfgang, 1990 Ibanez Universe UV7PWH, 1985 Kramer Focus 1000 (alder body) with Seymour Duncan Pearly Gates pickups, 1983 Ibanez DT155BK X-series Destroyer, 1989 Ovation 1758 Elite 12-string acoustic, 1978 Gretsch TK300 bass, and an Ibanez TR Expressionist Fretless bass.