I love the "thwack" that 110's make when opened. The lock sounds very strong and secure. Still, I saw the lockup fail on a friend's 110 many years ago. It resulted in some cut fingers but nothing too serious. That incident was due to pocket lint. I have never seen this happen since then. I've owned serveral 110's over the years and have never had that problem. I wonder how common this is and whether any of the model changes over the years make it less likely.