I switched to Apple last year and have a refurb iMac and a new MacBook Pro.
I haven't had any problems with the iMac, other than the fact that it's stopped going to sleep unless I manually select the option.
The MacBook Pro, which I bought in November, has had it's logic board, top case and bluetooth module all replaced already. It used to crash daily, but has been better since the transplants, though it's still not what I'd call reliable compared to my PC. Despite that fact, for some reason I've fallen for it completely and it's my daily work-horse now... despite the problems I believe I get a huge overall increase in productivity using it, and wouldn't swap it for the world now!