Many purists are going to stick with the non-gimmicked card version. But what I love about Jon Allen’s version is that it is easy to do and you clearly show the two kings in your hands even after you have supposedly placed the fives on the table. Then Bam! they switch places – hard to be that clean with normal cards. This is pretty much my go to item if I want to show just one trick to someone. Clean, easy and very visual!