Patrick is by far the best service. However, I would never buy a car from them. They are always more expensive than any other dealer though they typically have a great selection of used and CPO. If you are buying new, it should not make much difference.
Gone but not forgotten: 2008 BMW135i Vert
Added: 335i, BSM/BLK, M-sport, Sp. Auto, Prem, Tech, HK, 19", Apps, Lots of Plastidip, H&R Sport