My '15 MBP retina had it's keyboard and trackpad shit itself about 12 months after I purchased it. It was becoming apparent at the time that a) apple wouldn't repair it (they told me that I must have damaged it myself so they wouldn't do a warranty job, before even inspecting it) and b) they wanted to take the machine for diagnosis and repairs at the "local" apple centre (roughly 400km away at the time) which through experience I knew to take at least several weeks.
This was not a viable solution for me as it was a work machine, and any downtime was problematic. So I've permanently had my wired keyboard and mouse with me since.
Needless to say I've got an 8th gen i7 Dell on it's way in the mail now.