There's a class action lawsuit against Apple further notoriously Port keyboards on their MacBook computers. Although I have not personally experienced any issues until recently.
Apple sent me a box for reshipping my computer back to them to have it repaired or replaced. The problem however is they will replace it with the same POS keyboard.

I had to correct this post 2 times because of this issue.
The keyboards are the weak link.
The Issue I recently encountered is this not registering and swapping out vowels randomly.
That said I still believe they make a better computer than any Windows unit.
Just pisses me off that I will be without my laptop for 4 to 7 days.