I returned it. The material is just not soft / flexible enough. I had to try really hard to squeeze one credit card in each of the slot.
Although i didnt order the wallet, i think generally leather will tend to loosen up after use for a period of time. so being tight is common. squeeze a card into it, after a few days, it should loosen up and you can squeeze more cards into it. the only thing i am afraid of is, when i squeeze too many cards, it become too lose. with fewer cards in the slot, they will start to fall out
another tips on taking care of the leather. we can always buy a colorless or transparent leather shoe polish to clean and polish our wallet from time to time. this way, the polish will keep it look new and shiny.