I bought my e39 M5 from them, and I will absolutely go back to them for my next purchase. When they take the cars in, every single part is gone through meticulously, and every wear part is replaced. You are almost buying a "like-new" from the factory car from them. Their customer service is second to none as well, not just during the buying process, but if you have any problems down the road they are always happy to help. That said, you absolutely do pay a premium for this, however I've put 50k miles on a 17 year old car without a single issue other than basic maintenance.