I started with mine set at 3500. I felt the RPMs dipped too low at the point of launch so Mike emailed me two additional tunes for a 4000 and 4500 rpm launch. I found the 4000 worked best for me. It takes about 5 min and a laptop to switch tunes.
'13 35i M-Sport X3 | JB4 Stage 1 | BMS Intake | H&R Springs | Gloss black grill | CF Wrap and Coded by me | Recaro Child Seats
'15 M3 DCT AW/SO | JB Stage 1 | RKP Diffuser | P3 | M Perf Spoiler | iND Exterior Trim | Recaro Child Seat