The trick itself is awesome. But honestly, you will have to have a lot of things ready to perform it. Additionally, buy wax before buying this trick, trust me it's worth it. Otherwise, the card won't be examinable. Practically, don't use it outside, don't use it in a very bright setting, and don't sping the card more than 5 times. That's my experience, but I still love this trick and perform it for my friends and a few strangers.