So many overdrive and distortion pedals I've tried just sound so totally different from your original amp tone, that it makes it difficult to switch between the two and have a consistent sound.
I think one of the best things about this pedal is it doesn't change your amp tone it just adds gain if you want it or boosts and cuts bass and treble when you need too.
It responds well to volume changes, sounds punchy and you can get it for under $100.