Mine is terrible...You basically have to hit it in such a way to make to work that you have I'd say a 50/50 shot of making either button work on my phone.
Honestly this is a stupid problem to have on a phone in 2013. I thought that all phones arriving with ICS and higher would have nexus style keys built into the OS? Anyone remember that whole hoopla that we heard when the Galaxy Nexus released?
My nexus 4 as well as Galaxy nexus never ever had a button problem, come to think of it non of my android phones dating back to the incredible had a button problem. Like is said, pretty ridiculous problem to have in the advanced stages of Android.