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.
'15 M4 | YMB/SO | On order
'09 135i | Alpine White | 6MT - Sold
'06 M5 | Interlagos Blue | SMG - Sold
'99 M3 | TiAg | 5MT - Sold
'07 M Coupe | Interlagos Blue | 6MT - Sold