Just bought a Blue Comp in Lazer Manila, here's my thought: (Disclaimer: I am by no means an expert, mas sanay ako ng gumamit ng compressor as a plug-in sa DAW, this is my first compressor pedal)
Hindi sya transparent, what I mean is nagdadagdag sya ng konting "gain" sa clean, have to try this on other amps though tignan ko kung ganun pa rin yung kalalabasan. Pag nakaheadphone-amp ka using this, dinig na dinig mo yung kaskas ng pick sa strings pero hindi ganun ka-obvious pag amp without the headphones, I think the pick attack can be removed dun sa "attack knob" pero useless yung knob, lowest & highest setting nandun pa rin yung pick sound, love it or hate. Pero overall, I will keep this pedal because of its size, naisiksik ko pa sya sa BCB30 ko, plus I want to fatten the sound of my guitar which is very evident, ok sya as booster sa low gain pedal.