Mine worked fairly well up until a month and a half ago, when after a couple years of faithfully performing it's duties, it RROD'd me. Microsoft replaced mine, and so far so good (knock on wood). Bought mine from GameStop, used to have some freezing problems, but they weren't enough to keep me from playing.
Don't let the RROD scare you from buying a 360. It's worth the risk.
Don't let the RROD scare you from buying a 360. It's worth the risk.