I have big and bigger wallets for carrying all my credit cards, bank cards, business cards, ID, membership cards (airline, gym, parking), frequent purchase punch cards (buy 10, one 1 free), and much more.
When I travel abroad, I also have to carry whole bunch of different currencies.

Long story short, this wallet does not replace the ones you already have.
Then, why did I buy this wallet and love it? It provides a simple solution to carry what's essential for that day.

If I go to the gym, I only add gym membership card to ID, credit card, and Costco card.
If I travel and stay in a hotel, I only add hotel key card to  ID, credit card, and Costco card.
For me, most frequently used cards are ID, a credit card (I have a dozen but have one that I prefer to use most of time), and Costco card.

You can leave the big ones at home (while in town) or traveling bag or hotel safe.

So, if you can decide on those 3~5 cards that you have to carry all the time, THIS WALLET is MUST Have item. I love it!!!
It's also good quality leather, well made, and nice looking!

I also like the feature of showing ID outside or inside of the wallet (two locations for ID).
I put my ID on outside layer if I need to take it out at an airport.

I recommend this wallet to anyone who's tired of having a FAT wallet in their pocket.
I don't like carrying anything in my pockets (of pants/slack/jean). This wallet is comfortably slim and small for any pocket.

TY!