I've had my Volvo S40 for 5 years now with only minor issues which are expected for any car. I got it certified used in 2004 with about 30K and now have 155K. I cannot complain with my Volvo, it's been good so far!
Great gas mileage. I average over 30 MPG and can go over 400 miles on a tank. It's a good looking, safe car that doesn't cost an arm and a leg.
The cup holders are broken and replacing headlights is a little more $$ than most cars. The wiper fluid dispenser isn't working either, but that's my only problems with the car.