The lock takes a beating!
You can't beat the Master lock for simple security. I secure my lock on tree stands with Master locks. I came back to my stand and someone tried to break this lock with a hammer. They really beat it up. Needless to say, they did not get the tree stand. When I unlocked the Master lock it came apart in two pieces, but it held on when it needed to. It saved me one hundred times what the lock cost. Thanks, Master lock!

Works like they should
What's to say about a lock? They work. Got them for the gym... good price, good lock.

Shackle rusting less than 2 months later
I bought these specifically because they are supposed to be rustproof but what I found after about 6 weeks is the shackle is starting to rust on both locks. They are both installed on gates that are outside and sheltered by the roof overhang. Master Lock's policy requires you to mail the locks to them and they'll send replacements in 6-8 weeks but that's a long time to go without locks so I guess I'm out of luck.

Great outdoor padlock set
I use one on my garage "man-door" and one on the backyard chain link fence gate. It's terrific not to have to carry extra keys on my ring, and I've had these locks outside in all kinds of weather and they continue to work like a charm. If they came in four locks keyed alike, I'd buy that.

Necessary for national defense.
If you are in the reserves you know how much trouble it is having two separate locks with two different keys for your duffel bag and T-4. Try fumbling for the right key or looking at a combination lock in the middle of the night. On occasion you are required to leave a key. This allows you to keep a duplicate incase the other is not available (save the truble of making duplicates). I grew up with Master Lock and it implies, "do not even try to mess with this lock."