I had the original Sinclair cart knife (the photos depicted on the Shar-X CardSharp Card are from it and NOT from the product being sold) and unfortunately it was confiscated during an airport check, so be aware if you are traveling by air. Well, this (the Shar-X CardSharp Card) has no quality resemblance to the original, it is a good but cheap copy. Its plastics are cheap, the card's attachment to the handle is poor, the safety is difficult to operate, but at least the blade is okay and sharp. Of course, for such a price (1€) you don't expect anything different. So, in terms of value for money, it's okay.

I cannot blame it for the gadget of under 2 euros. the plastic contraption holding the blade broke the second time I used it. nice form factor but that is the only redeeming point I can find

Blade very good.
Size of a credit card for a wallet.

Otherwise, it's cheap plastic.
The safety of the blade broke.

Full plastic. The mechanism that keeps the blade safe broke very quickly. The company makes the same thing in metal but I can't find it on skroutz.

Smaller than expected, but I can't say that the marketing is misleading since it literally folds to the size of a typical country card easily in the wallet. Although I would prefer a slightly more expensive construction (it is all plastic with only the blade made of some aluminum alloy).