I have not had issues with their sales department, BUT I WILL NEVER EVER get service at their service department. Absolutely completely 100% unprofessional and almost everyone is a liar. The only ones I don't know are liars are the ones I did not deal with during a simple warranty fix for my wife's 335xi.
Grey Matter:2008 E92 M3:608/425. SG/PS
Dark Matter:2015 F80 M3:495/505. AB/CB