Once I entered an Apple store with a cracked case (white MacBook fell from the table). I left with a brand new lower part (hard disk excepted - they moved mine to the new machine) for free. There was a recall for the case, IIRC, one for the upper palm rest (something to do with magnets that made the plastic crack) and they replaced the keyboard for no reason.

I have to say Apple's support experience is stellar. I can't imagine having that with a Dell or Lenovo.