I think it's great! I like it and perform it often! You treat the card like a camera film. You can also have them sign it. The "signed film" visually prints the "card they were thinking of" in an instant! ↑ This is the impression from the spectator's point of view. The final change uses Ben Harris's original technique. You can do it with a little practice. It's easy once you get the hang of it. Overall, I don't use any particularly difficult techniques. The difficulty level is probably for beginners to intermediate players. It's fun! Please add it to your repertoire!