Bought my rMB 12 in June and have had no problems with it, love the size and screen and the incredible speakers. Then, in the past week or so, it seems several keys have started to "die" on me. The space bar is the worst, it will only now register a click if hit in the middle, nothing at the ends, and the ends look sunk / depressed into the base. Other keys sometimes also fail to register when typing, though not consistently. I must admit, it's been an adjustment getting used to the new keyboard: it feels very "hard", almost like typing on glass, and it makes a loud noise when I type, I find myself "pounding" quite often to make sure the keys get depressed enough to register. Maybe all this pounding wore things out? Anyway, took it to the Genius Bar at my Apple Store here in Hong Kong and they are going to replace the entire "top" unit, including the entire keyboard. But they don't have any in stock, so will take a week to order, then several days to do the repair. Bummer. Just adding this post as an FYI if others are having keyboard issues and want to know how common / uncommon it may be. I'll update once the repair is done if anyone's interested.