although this is too small for my 19" laptop(i know, what was i thinking), the difference in how much cooler the laptop feels is staggering. i used to have to play games at the lowest setting to prevent crashes, but this should solve that. I had another one with 3 fans(cheap one from Maplins), but no small holes for the air to flow through, so the temperature didn't drop too much as the fans were blowing into the original laptop fans inside.This has like 600 holes so the air is distributed all over the base, the whole base of the laptop feels nice and cold. the CPU temp has only dropped by 5 degrees(still impressive), but if you use your laptop for gaming its more than likely your graphics card that is overheating - this does a fantastic job of fixing that. also, the cooling mats you see are a waste of money - they melt after about 5 minutes and you have to remove them because the fabric covers the laptops internal fans. Put in the extra money for this - worth every penny.
about the noise - even at full power this makes very little noise(compared to a powerhouse PC), on minimum(you will prob use this if you leave your computer on overnight downloading) you can barely hear it at all.