i am going to have to disagree with micheal on his review.
I had never done,seen, had a vision of, the fingertip muscle pass. could do this, not well, in about an hour by playing around with coin/ finger placement. within two days of messing around(not spending hours at it), I was loosing my coins because they would wizz off past my hand. I would say that the hardest part is catching the thing when you got the speed. this is with a silver cnd half.
there isn't a lot of instruction to give on this. it's nacky. probably a little different for everyone due to finger size,strength,chubbiness.
my tips, if they will allow to publish it.
first ,feel your fingers at the very end. there is a little bump on the end of every finger that is bone, shallow, just below your nail. place fingers facing you. then coin at a 90 degree angle,edge on top of those little bumps. if you got long finger nails, it will hinder things, mine are cut real short. do the "move" and it should shoot out. I had trouble till I found the sweet spot. you can do this with nails, I just find it easier with them not in the way.
tip two, practice " horizontal/palm up" first. people who bought this will understand. it makes it easier to catch.
tip three, practice with both hands(both ways). why most magicians practice sleights and tricks with one hand or one way always confused me. I have found that if you are having trouble with a sleight , if you use your weaker hand, you will gain insight into what you are doing wrong. that, and you will be able to do the sleight, and trick, the opposite way which is super handy if people want to see something again.
even though I can make a silver half wizz out 2 meters horizontal, vertical lift of the same coin is drastically reduced to a few inches. a dime, make sure no ones face is in the way. maybe they should have a warning on this for pointing it at someones face. small enough coin, you could hurt someones eye with this.
I find this useful, fun to do, and I have played with it every day since I bought it. it does have a knack, but it is well with in reach of some one just starting out. it's not an advanced move in the sense of actually doing it. control during usage is where your practice will mostly lie, so you don't take someones eye out with a dime.
hope this review has helped people make a decision. this is just nacky. once you get it ,though, you'll feel stupid for how easy it is.