I bought this from another auction style website but it was new and unopened. I was quite nervous as I saw a few reviews about no instructions. I opened the package, took the strap out and then removed the cardboard that was behind the strap in the package. The instructions were a smallish piece of white paper in between the 2 pieces of cardboard. You have to actually pull the cardboard apart, it doesn't fall out on it's own.

It's very easy to set. For those who can't find their instructions or they are missing:

Push the button on the bottom to open the lock section.
Inside at the top there is a small square metal piece, lift that up (it comes up quite a bit)
Set your desired combination
Push metal piece back down
DONE.

Strap is strong and fits around my case great.