Amazing product with RFID! I saw it with a friend who has been using it for years, he also had similar ones from other companies and recommended it to me without hesitation. I watched some videos on YT, especially from the expert (and strict) walletopia that deals with such wallets and decided to buy it. Purchased for €49.99, the package includes the wallet and 2 leaflets, one of which is the user manual. I've said it before and I say it everywhere, read the manual. Especially the part that shows the correct way to place the cards to avoid demagnetization of your cards.
The manual states that it holds 4-6 cards depending on their thickness and one card on its inner right side. I put 5 cards plus the new ID, 6 in total, on the side you can access with the side button and a paper one (of AMKA) on the inner right side, all fine. It has a slot for banknotes, I assume it holds up to 10 because after that the magnets don't keep it closed. The new ID fits perfectly, the old one (the blue one) obviously does not because it is larger than the wallet. Still, you don't need the ID with you, just download it to the app on your phone, along with your driver's license. The magnets and closure are very convenient, you can even use them to stick it to any metal surface. I would like the side switch (eject) for the cards to be a bit better as it is plastic and has a slight "play," but the important thing is that (a) it makes them accessible by a few centimeters so you don't worry about them falling out and (b) it holds them even if the wallet is turned upside down.

EDIT: 14 months later it's like new!

I have 6 cards, 2 of them are embossed. It can hold some banknotes, but it swells quite a bit after, for example, 4-5 are okay

While it is very practical and convenient, I wouldn't say it is durable.
The mechanism broke after 15 months, which I find disappointing considering it is not cheap at 50€.
Nevertheless, I replaced it with the same one.
If this one breaks so quickly, I will reconsider.