This modern approach to the 8 card brainwave is a huge success coming from Michael O'Brien! It is such a fun effect to perform that really gets the audience involved, in fact, the more involved they are the better the performance is. Production value on this is outstanding. The cards that are included are wonderfully printed. The color is so vibrate. Skill set for this effect is begginer, but don't let that detour you from getting this effect. As with that and it being angle proof, this is an effect you can really focus on the presentation and not worry about tricky slights or moves. If you want to know more about this trick I have a video posted on my YouTube reviewing this. You can check it out here