When I bought my Zed it had 12 Nissan service stamps and probably 3 from independents. I wanted at first to keep the car Nissan maintained, ..so took it to my local Nissan dealer for the spark plugs to be changed. Cost me around £220 all in for the job. Afterwards I inspected my engine bay only to find damage on my MAF unit (chunks taken out of the plastic) where I had put a brand new K&N service sticker (you know the one that says "lifetime filter: do not discard") so it was noticable. Really pi**ed me off and I'm never going back there for service work as they obviously don't give the care a customers car deserves or maybe it was just because my car is not brand new. Either way my local garage guy is much more caring with customers cars, has good knowledge and is about half the price to do the same jobs. If/when I want something more important doing I'll just drive it up to Abbey Motorsport or similar reputable tuner to get them do the work.