I have a Dell and I love it. Yes, I've had problems with it. I have an extended warranty. I have a problem, I send it to Dell, they return it with new parts, free of charge.
Over the course of 4 years I've needed a new hard drive, my screen was replaced twice (the first replacement was faulty) and new video cards. I've never paid a dime for service and it runs great now.
This is considering I am rather hard on my computer, it goes on a 40 min bus commute daily, is turned on and off in classes, runs on battery then ac etc, gets dragged out in -40 degree Canadian winters etc.