Kelly controller programming

I messed around with the controller programming today. It was pretty easy (doesn't work with Windows 7) and I set the Throttle start position to 20% and 30% and the performance was really bad, only 20 MPH with it floored. Fany at Kelly also had me set the throttle up/down to "lower" and at 20 it would take forever to "ramp-up" to speed and at 1 it would do better off the line but had a dead spot between 15 and 30 amps about. Very frustrating. I've asked them to let me return it unless they can suggest other settings.