The Obvious thing to say here is the ad copy is 100% accurate. However, I don't think this truly gives it justice. After reading this it feels even better then how it's described. As far as missing well I feel like most mentalists are generally ok with this level of missing and this gets better with practice, to the point I feel like misses would become that rare it wouldn't matter anyway. To be cliche "I hope no one buys this" to be honest it would be a shame if this became too common.
Honestly, if it sounds like something you may like, just buy, you will like it.