i had avoided the cles for a while thinking that it was something that i wouldn't use. i finnaly bought one about 2 months ago to use it strickly as a key chain (i got the vernis perle also & i love the cles and am obsessed with the color).
i keep the license in it so if i'm going somewhere that i don't need my ag (like taking the kids to school) i can grab just that. it cold hold a few bills (& some change w/o the license) but not much more. for it's very teeny size, i find it extremely usefull.