Apparently!!!
I'm happy with Abbey though because I find they are honest and professional so if there are problems they don't gloss over them or overcharge me for them either. But they are *stupifyingly* busy which means sometimes a job can't be done until 8 weeks after initial contact, which makes minor tweaks a big headache.
It's the lack of in-depth knowledge of the Z which is the major headache. Of course, by the time the major tuners have this, we'll all be on the GT-R forums with our 2007 supercars complaining how there's no expertise in them instead
Give me a month and I'll be UK Z UTEC tuner No.1