maybe I lucked out, but I got my MS3 used and so far haven't had any trouble with it. 15k on the dash and the previous owner was a 40+ yr old woman. She took care of the car for a year and then traded it in for some VW. I've since dropped another 5k on the dash and have not experienced any of the annoyances I keep reading about.
Coming from a Galant, this car is like a vette.
I guess the choice would depend on many factors, but if you rule out the obvious reasons of why not to buy any used turbo car, it's a great car to buy used. I'm happy!