I've read an awful lot of threads on this forum about keyboard keys failing / falling off. Is there an inherent keyboard problem with these 1st gen rMBs? Are the keyboards inevitably going to fall apart? My old MBP is physically (not performance wise, and especially not battery wise) holding up like a champ after five years. I love its design and the single USB port doesn't bother me, but the keyboard problems that I've read about are making me hesitant to pull the trigger. There are some pretty decent rMB deals to be had today online.