These guys are the best and clearly, they love what they do (you can tell because everyone is always smiling). They take care of my M-4 and did a great job with a Dinan upgrade on my 335is years ago - turned it into a rocket ship and have never had any problems with that. Communication is great. Always willing to give a tour of the facility and show you the interesting cars they are working on. Jeff is a pleasure to work with. Recommendation to ditch the run-flats is a real winner. I was ready to buy new rims to put more rubber between the rim and the road the ride was so rough. Their advice saved me a lot of money and I cannot believe the difference in the ride. Trust Sarek Autowerke.,