Tonight my Kryptonite lock stuck. I tried for 30 minutes to open it and got nowhere. Luckily I was close to home, so I fetched the two extra keys, some graphite lock lubricant and canned air.

I'm not sure which (if any) of these remedies worked, because it took another 15 minutes of fiddling to open the lock.

I don't think I will be able to trust this lock again after it almost caused me to spend all of Christmas Eve night weeping and gnashing my teeth in front of Whole Foods.