I had the complete kit installed beginning of June. It took them around 10 hours.
The software part alone was more than 3 hours. Whoever says 45 minutes has no idea.
'11 E92 BSM 335i / Saddle Brown Dakota Leather / M Sport / 19" 225M / DCT / Navi Pro / BMW Individual High End Audio System / Cobb Stage 2+ / AR Design Catted DP / ETS FMIC & Charge Pipe / K&N Drop In / BMW Performance Suspension / BMW Performance Diffuser / M3 Lip Spoiler