I was able to reasonably fit 10 cards plus a drivers license in the wallet. That does make it more bulky than intended, but it shows the wallet can expand a little. The only thing I've had issues with is the cash strap. It doesn't work all that well for me. It is more awkward than a top loading wallet and I find myself trying to cram cash back into it after making a purchase as I hold everyone behind me up. It is a step down from a money clip too. It isn't practical to try and remove just one bill without taking them all out.
Overall, I think it is worth purchasing if you have <10 cards and rarely need to use cash. Even with the issues I have with this wallet, I appreciate the slimmer form factor from my previous wallet. It is much more comfortable to have this wallet in my front pocket with my phone than the last wallet.