I've had my truck box since I bought the truck Sept. '04. It is in great shape but needs graphite on the hinge ever now in then or it squeeks very loud. I don't carry anything heavy in it, groceries, light tools, cooler, luggage. The lock is not great but I don't think I've ever seen a lock that would keep a determined person from getting in if they wanted to. The box is easy to remove if I need the whole bed. I paid $500, a bit steep, but I like it.
I flew from La Guardia to Dulles the other day. The parking shuttle drops me off at the bus stop and I walk over a few rows to where my truck is parked. WTF, my truck box is gone. For two seconds I'm very very pi$$ed off.

Then I noticed it wasn't my truck.

I was actually parked a few spaces away. I saw the first Red Brawn CC from the bus stop and made a beeline for it. My wifes says I get pi$$ed off to easy. She may be right...nah.