I have no experience with the service dept at Seattle, but I couldn't say enough good things about their sales dept. I went in to test drive a car they had- didn't love the car, but I really wanted to buy it just so the sales guy would get credit. Was by far one of the best experiences I've had with a salesman at a dealership, aside from the dealer I just bought my new car from. Would gladly buy a car from them in the future.
From reading all the good reviews about the service at BMW Seattle, and after my sales experience there, ill definitely be taking my new car to BMW Seattle for service as much as I can. Thumbs up to them