These are essentially caps that you adhere all around your teeth. For the few minutes I had them actually in my mouth they were pretty cool looking and pretty realistic--though talking was not as easy (not impossible just slightly impeded). My first attempt with these and I could not get the glue to work at all. Perhaps I was just a little hurried...you have to mix two different solutions and I missed something. The second go I was more careful to read the directions and got a little freaked about the mentions of the overall flammability of the product (so if you smoke you might think twice)  of what I was putting on my teeth. They looked good. I waited the suggested time to let them and after an hour one fell out and not much longer and the other one fell out.  If I was 100% confident that it was a product issue and not a mistake in following directions issue I would give these a bad score but I think in this case it was not that simple. I am giving my score assuming user error but with a reminder that application is not the simple. On a good note they come in a groovy reusable vampire case.