As far as I know, the major issue with the GT-R is that if you use the launch control you voided the warranty on the trans -- a few folks must have broken theirs.
Don't know if they amended that or not, but considering you can buy about 3 Z's for 1 GT-R, if something goes wrong, and the warranty won't cover it, I expect if you can afford a GT-R in the first place, you can afford to fix it...
And if you can't, save the money, and just buy two Z's so you always have a spare on hand
