This looks absolutely fantastic! If Merlin actually sold these, I'd get one. It is evident that your attention to detail is very good because you've even included Gerst's logo on the restraints!
I suppose I should help you by offering a point for improvement. You could have some sort of storage for other types of badges, or maybe some little hooks at the front for keyrings, but that all depends on how the clients usually use those things (on keys and clothes or just collecting them for the sake of enthusiasm).
However, without those things, it is still awesome