Firstly I don't have any equipment that would be required to test them to make sure they even cool properly like they suggest. For the price, though, it doesn't hurt if you already own a non-thin Xbox 360, as heat is the main cause of those dreaded red death rings. They are very easy to install as they use a sticky heat transfer medium so all you have to do is peel and stick the protective film. If your warranty is still valid I would not recommend opening your Xbox 360 as this will void your warranty, but if your warranty has already expired I suggest doing your best to clean the airflow and heat distribution of the original 360 to improve Most An easy way to get started is by using these handy little heatsinks. I'd suggest doing a little research to find out what model of Xbox you have and where the RAM chips are on it that work before opening it up, just to get your bearings first.