I've never played through a quack, so I don't have a comparison, but I like this one, it has a clear punchy sound at the top that comes through and kicks both clean and distorted, so it can also be used as a treble clean, which sucks, it's a pass-through sound no effect, it is like through the mattress, which is what I expected and the warranty does not guarantee, I immediately replaced the switch with a new DPDT and made it a true bypass, the effect has not changed, but the clean sound is strong and clear and you can connect it with other effects, which before that it didn't work, it completely degraded the sound, for those who have the same problem, a link to "Pavel Marcel, make a true bypass", otherwise I can only recommend the quack for the money, it sounds great, enjoy it, replace the switch and divide the signal paths even a trained chimpanzee can handle it.