We got a Clone-A-Willy kit after considering it for a while. We did some research online for reviews. We also made sure to carefully read the instructions a couple of times over before beginning; and we also laid out all the tools and materials that would be needed.The key to success with kit is preparation. Make sure you've got everything ready to go. Make sure you've read the instructions. Formulate a plan of exactly how you're gonna get things done. Only then should you proceed.In our case, my wife and I got things ready to go. My wife got me hard, then measured the molding tube, which I then cut and taped as instructed. Although I did cut the tube a bit longer than my measured penis length, it turns out that I cut the tube too short and ended up pressing it up against my body harder during molding than when we measured. As a result, my penis pressed against the end of the tube; this created a flat spot on the penis head of the clone, and caused a bend in it that isn't present in my actual penis.The only other thing that didn't work out perfectly was that we weren't careful enough to make sure my penis was centered in the molding tube; so a second smooth patch on the side of the clone occured where my penis contacted the side of the molding tube.The actual clone, though not perfect, is still very usable; and it was very fun to make too. We'll getting another kit in the future, and trying again, taking greater care with the steps that we know we should have done differently.All in all though, these kits are a lot of fun. Just do some research to benefit from the many people who have tried the kits before you; and get materials, tools, and a game plan ready before starting. Do that, and success should be no problem.