Weird, I haven't experienced horrible service with BMW...yet. I owned a G35 before my M coupe and I can tell you that Infiniti's service is absolutely garbage. I can only imagine what Nissan's is like.
'11.5 ///M3 | SSII/Fox Red | ZCP | DCT
'09 135 | AW/Black | 6MT - Gone
'06 ///M5 | IB/Black | SMG - Gone
'98 ///M3 | TiAg/Dove Gray | 5MT - Gone
'07 ///M Coupe | IB/Black | 6MT - Gone