For ten dollars, this wallet clip is an absolute steal.
I had no problems at all fitting money into the clip- I usually only carry a cursory amount of cash on me anyways.
There are three primary credit card slots, which hold the cards very tightly and securely- over time it will become slightly easier to slide in/out as the leather ages.
The ID slot holds my ID in place well, though it's a little difficult to take out- no problem though, as it's easily visible. I can also slide in a second card behind it.

On the money clip side there's a last horizontal card slot. I use it for my concealed weapons permit, and insurance card.

My original wallet was nearly 3x thicket than this slot, however I'm able to fit everything from my original wallet into it! It's fantastic.