One of the keys on my MacBook Air keyboard broke about 6 months ago. The busted key made it unusable as a laptop, and I don't need/want a desktop (aka attach it to a keyboard & monitor). Authorized Apple repairs were a few hudred bucks. I was strongly considering buying another Mac, but that seemed like such a waste over a single busted key. I decided to try one of those aftermarket key repair kits, and it actually worked. I spent less than $20 to fix it. I'm glad I tried! If I hadn't been able to fix it, I would have been super vocal about how I had to trash my laptop over a busted key on a keyboard, so I can understand why people who sound upset.