I've been checking out looper pedals at guitar center and it seems to me that most of them are trying to over-complicate such a simple task. Why not just ...tap -> record, tap - dub/playback, doubletap to stop and hold 4 seconds to clear? 10-15 mins of max record time and done. No knobs, memory banks, modes, drum machines, quantizing synchronization, or USB hookups required. Ok, you might setup a 2nd button for reverse playback maybe, that would be cool. But why can't they just keep it simple? If I want to play back to a recorded track, i'd use a multitrack recording device, if I wanted a drum machine, I'd buy a good one. I just want to overdub a loop! edit: ok, I concede that a few controls would be useful. A playback level knob and a simple mode switch to change from (rec > play > dub) to (rec > dub > play) depending on if you want the 2nd tap to be recording over the playback or not.