I recently had the chance to try one of these out while recording at Ghetto Recorders in Detroit. Jim Diamond had this and a Colorsound Overdriver kicking around the studio. I plugged the Tonebender into a '68 Princeton Reverb Jim had there and used it on 2 songs. It sounded great as did the Overdriver my bandmate was using with a Mosrite Fuzzrite amp. I can't seem to find any decent videos of this box, but if you can find one at a reasonable price I'd recommend picking it up.