I'm considering buying the MXR GT-OD, but I need to know if it will have the type of effect I'm looking for. I play with a Fender acoustic guitar (with a fishman aero pickup) through a roland keyboard amplifier (I also play piano). I'm wondering if I put the GT-OD if I'll get a similar effect as plugging in an electric through a guitar amp, or If it's like the Ibanez tube screamer, where it just boost's the signal to push the amp into overdrive. I also like to play blues and classic rock