Everything has problems at it's first stages of life, I've got one of the 1st gen PS2's and it still runs great. It's pretty obvious if a 360 breaks, Microsoft will fix it / replace it with a model that ISN'T going to break, not like it's gonna break over and over, am I right? It's (Theoretically) like a car dealership. Something goes wrong with it, it breaks, dealer fixes it to get it out of their way.
tl;dr: Shit breaks, no matter what.
I lol at the fanboyism in this topic, seriously. I've got things from all three of the makers (Sony, Microsoft, Nintendo) and they all do something right. Different things right. Other things wrong.