I like these boots. I just got them but have worn them twice. They come up to mid-low calf. And I have avg sized calves, so these fit perfectly around them. (But if you have trimmer calves, these boots will probably gap).  Plenty of adjustable room if your calves are shapely.
The hidden zipper compartment is on both shoes and can easily fit credit cards.  But the compartment is rigid, so I imagine fitting cash (unless sandwiched between two plastic cards) will be difficult to put inside without crumpling it.
You can fit a single house key or even a compact car phob in the zipper. But nothing bulky like a toob of lipstick or lighter; it would show.

However, I gave them four stars bc the fit is....weird. I wear a 7.5 running shoe and 8 in heels. I got 8s bc my feet are very, very average. Not wide, not to narrow,  stair step toes. 95% of (well made) shoes fit me exact to size. But these boots... IDK. It's like they are designed for someone who might be slightly pigeon-toed. And definitely designed for narrow feet. If I wear heavy socks (or cute "boot socks") the toe of this shoe pinches my toes. And with thin socks, after about 3 hrs of wear my feet start to hurt. (But that could bc I need to break them in?)

I would be cautious about recommending these to my friends.