So far (3 months) no big problems.
There is a small squeak coming from under the dash that is barely noticeable.
I did replace the factory shift mechanism with an aftermarket one. Big improvement from the sloppy feeling stock unit.
Very pleased with the car, have wanted a mustang for several years and really like the looks of the 99+ models.
Great performance, quick and responsive.
Getting better than expected 22mpg on the highway.
For a tall driver the seats aren't very comfortable.
Hey that squeaking you hear under your dash... I also have a 2002 gt and its actually your cowl the black plastic piece on the outside under your wipers. it has little clips in there and eventually wear through the paint causing it to squeak. i took mine off and put some vaseline on the clips and I haven't had a problem since and that was a little over 3 years ago.