Functionality is great. I have ten cards / no cash in mine and it's tight. Nine cards would probably be ideal. I gave four stars because I ordered the color anthracite. I was expecting it to look more of a dark gray on a black background. In my own photos it even looks a bit like that, but in real life it's more black on black. I would order the colors of the sea or the metro if I saw these "in my hands" for the first time.
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