One important thing to consider IMO is the history of the tuner. Dinan has been around for so long and is top notch no doubt. I know their warranty stuff with BMW is a bit different now but the fact that BMW did warranty their parts speaks volumes about their products. Even their warranty now is still outstanding. The history and quality of Dinan is unsurpassed. They are BMW's "go to" tuner! They have always been ranked number one in my book and many others. It's not only about the power or numbers a product puts out. As a company, it is VERY hard to put anyone ahead of them!
2014 M5 Competition Alpine/Sakhir
BMS Tune. Undercover Performance Custom Downpipes & Connector. H&R 10mm Spacers. BMW CF Rear Spoiler. IND Cosmetics. ALP & BEL Radar & Laser.
2011 Space Grey E92 M3 AA Gen 2 Lvl 3 586whp 398wtq SAE (sold)