Sorry to jump in late, but my 2002
MCS (31,000 mi) has been a dream. The dealer fixed the minor problems (expansion tank, rear hatch rattle) and I haven't experienced the seat, tail-lamp, windshield, and other problems others have reported (nor have most 2002 owners, as they largely keep quiet if nothing goes wrong). The supercharged engine and 6-speed Getrag have been my favorite features of this car. I have been changing the oil myself between service intervals, as it's cheap and easy to do.
(To expand on Spectre, service is included for 36k or 3 years, whichever comes first.)
So if you find a well-maintained 2002 and the price is right, go for it. But MINI resale value has remained high, so it's your choice if you want to spend a little more for a newer model.