There is really everything; Price, processing and use value. Just something I've been looking for my customer visits in China. After 2 weeks you have together quickly 30-40 business cards - and soon also some laid back with 2 appointments per day as well. This will certainly happen to me with this case any more. That there is also space for credit cards and if necessary also for bank notes is an add-goody!
Certainly as a customer gift very welcome!