I have a few months old non touch bar MacBook Pro. Back in February, the control key failed to where about 50% of all keystrokes didn't register. They ran some tests at the Genius Bar, told me the keyboard and casing needed a full replacement, and shipped my guitar out for a week. One week after I got it back, the reduce brightness key started missing some keystrokes. I took it to the Genius Bar, where he was able to reproduce the issue, but his first line of response (missing at my last visit) was to offer a cleaning. He said this had to be done in the back using special tools, and took my computer away for about 10 minutes. Upon return, the key was working at about 95%. It seemed 100% to the genius, and his suggestion was to continue making Genius Bar appointments when the issue arose for cleaning. He also told me they only replaced 1 key at my last service appointment, which is different than I was told prior. Tonight, I was playing an online game and my X key started going out. The issue seems most prominent under heat load (3D graphics). As I type this, it's fully functional, but I can assume that once I get the computer under load again it will be intermittent. The genius said these keyboards are much more sensitive to any foreign objects than the last ones. I cannot live in a bubble, and I don't like protective covers. As an aside - why do only keys on the left side of the keyboard start to fail? I'm interested in a permanent fix or a refund, which they told me essentially my only option is to continually bring it back in. Any suggestions on dealing with Apple on this issue?