Had the lock for a month use it for my ...
591025
Had the lock for a month use it for my gate and it's locked and the combination does not work will not come off and called kryptonite  they said there's no way to get off if you change the combination course I change the combination they'll reimburse me for  to have somebody cut it off and send me a new lock no thanks !!
3937404
Winding key broke (stripped?) after about one month and the key will not reattach.  It does take a bit of force to hold and wind the clock (it's not a particularly smooth mechanism), but just be very careful when winding.
4220177
locks are so loose after 5 months that they could be opened by my grandchildren. I am really surprised as I own a smaller version of this case and
it works extremely well. I give it a one as it's major function, security, is very week.
Dale
3635628
I had a hard time lining up the top and bottom of the locks.  I used it for a short time and then one day, the lock refused to budge.  Now I am once again without a safe place for my meds.
337683
In use one month so far with no problems.  The lock was easily installed.  Will update if quality issues appear.
77914
I'm not happy, I've only been using this one month and the latch won't stay shut. I liked how it was sturdy.
1354200
Haven't had it for a month, won't stay closed and is already breaking.
3941258
I would not recommend buying this lock for two reasons:

1. You have to line up the letters EXACTLY right or the lock will not function (there is no click in place you have to just play with it until you get it right).

2. Exactly two months after I bought this lock one of the tiny pins came out separating the silver part from the rest of the lock (basically it just fell apart). I tried to fix it but it with no luck.
4436935
This lock will drive you nuts after a month of use. The cylinder routinely sticks and makes it impossible to rotate to a locked position and in the process kidnaps the key.
2084028
Who knew?  The Masterlock 4 digit combo locks we had been using have been failing after 2-4 weeks.  After the third one, we tried another brand.  This Sesamee lock feels well put together, and it actually holds up!
3090363
Its was ok the latch broke within a month!!.. now its useless cause it won't stay close
2877915
I bought this lock at a local walmart.  I live in Southern Illinois so it is warm most of the year.  This past week, (and I live on a college campus) I locked my bike up on campus using this lock.  When I came back a day later, the temperature dropped and there must have been ice in the key slot.  To make a long story short, as I was trying to unlock the lock, (took about 5 minutes to get the actual key in the keyslot, When I tried to twist the lock to unlock position, the key, obviously not made of the strongest alloy, snapped off.  Luckily my friend came to my aid and was able to use a needle nose plyers to unlock the lock, but for about a week my bike was left for dead at this bike rack. Dissapointing. I don't recommend getting this lock unless you live in a warm climate.  I think the lock was an update model.  It says "20mm hardened steel."  I don't know how tough it is for a crook to break it, but if theives don't ruin this lock, cold weather will.
4898731
I bought this lock a few months ago from Amazon. After a few weeks, the key started jamming in the lock. THe bits on the key wore down. I thought maybe it was just a lemon. So i ordered a replacement. Within a month, the key would no longer turn to lock. After trying many times, i realized i had to literally force the lock closed before the key would turn and lock it. It is a hit and miss proposition though as sometimes i cannot get it to lock no matter what i do.

I've had other kryptonite locks and none have ever done this. I read similar reviews about similar problems but out of stubborness i ignored them and bought the lock anyway. I highly regret it. Nothing like taking your bike out and not knowing if your lock will work when you get to your destination. I recommend staying away from this particular model.
720741
I bought a similar lock to this about 6 months ago, filled in the paperwork and sent it in by certified mail as requested to get their warranty in case my car was stolen. A few months later, my car got stolen, first time I've ever had a car stolen. First, this lock was able to be picked by a standard flat head screw driver. Except for it becoming loose, it would still be "useable." Second, when I went to file the warranty, they claimed the original registration never got to them and therefore not entered into their system. I attempted to show them that I had the receipt for the certified letter and a copy of my original receipt, but the representative basically told me they do not honor the 1000 deductable grantee. I was a faithful customer, but with this I'm going to be using other brands for my personal and business use. I expect they'll lose more than they gained by this decision over the course of 5-10 years.
1870146
My $570 bike got stolen about four weeks after I bought this lock, so no recommendation from me at all for this lock. I had a Kryptonite chain lock before, which is almost unbreakable but also clunky and heavy. After this experience though I would always make this compromise.
1281097
I had this lock for my brand new bike. One month later, my bike was stolen from my local gym. CCTV showed that it took 10 seconds to cut through the lock and steal my bike.

Even the Kryptonite website only gives it a 3/12 rating for security!

If you want to stop theft, you need to spend more money.
3683468
Used this lock to secure a game camera. It came in on 10/01/15 along with the Stealth Camera I ordered and I put it out that afternoon. I read the reviews talking about the cheaply made key and how easily it was broken so I was extra careful. But I noticed it took a bit of force to unlock it. I probably locked and unlocked it 5 or 6 times before I got it right where I wanted it. I went out today(10/04/15) and after reviewing the card from the camera I decided to move it. Put the key in and snap! So now I have to drive home from the lease and get some tools to try and cut it. Luckily after reading some of the other reviews it sounds like it won't take much.