I originally bought my car from Century West BMW, so that's where I initially took my car for service.
The service advisor I first dealt with was Shawn, and he got me a loaner car and was quite helpful. I was more or less happy with the work they did, except for the fact that the service department seemed to be overloaded, and it took them much longer than required to fix my problems.
One day, my BMW started to emit green fumes from the a/c vents that smelled absolutely terrible, and made me sick so I took it in immediately. Shawn was off that day, so I was assigned to Kelly. Kelly took my car, and they put it on a lift overnight and pressurized just to make sure there wasn't coolant leaking. There wasn't, and later Kelly told me this was "normal." Needless to say, I didn't believe him. I asked to speak the the shop foreman, Joe, and he told me this was entirely normal, happened with all the cars, even his wife complained about it, and there was nothing he could do.
Not knowing what to do, I took my smelly BMW and asked for some help on BMW forums. Some helpful folks gave me a TSB number, I called Kelly, gave him the number, he printed it out, and told me "No problem, we'll have it fixed." When I arrived, Kelly had another story. Apparently this was not covered by my warranty, BUT Joe authorized that they could do it as a one-time goodwill since I bought the car there. I later found out that wasn't true either. They fixed my problem, but happened to snap the microfilter in half. This didn't affect the performance of the item, but it left me with a bad impression.
The service advisors overall were friendly, though this last experience was terrible and my conversations with the head mechanic made me question the comptency of their repairs.
I would not recommend this dealership due to the questionable quality of their work, along with all the probing and pushing I had to do to get this last problem fixed.