These are great! When not performing I run a custom motorcycle shop during the day. I love the reaction I get when I let one of these "go up" while going through my sales pitch when selling a bike. I'll say something like, 'why burn your money with those other dealers when you can...blah...blah...' I'm sure you get the point. Sometimes I will combine these bills with the "Counterfeit Detector" device (found at your favorite magic site) for a real shocker. Talk about burnin' money! I can honestly say that these flash bills have certainly helped me get my sales up. A good quality product.