Lindsey Bimmer has been servicing my '10 528ix for several years now. Excellent communication, and will do "stop gap" work, but recommends against it. I have always gone for the recommended repair. My latest was misfire caused by oil leaking on coil #4 from a valve cover gasket. They recommended valve cover gasket (they had identified a leak previously, and recommended a repair, but I passed at that time) plus all plugs and coils. They clearly explained the advantages the full service, vs various minimum repairs. I opted for the gasket, all plugs and one new coil to replace the oil soaked one. My vehicle was repaired quickly and completely. They even had a loaner for me!