Cheap, light arch, but there is a big fan, so check that your laptop fan is more or less in the center or it did not really cool or not at all. However, even without turning on the fan (powered by a USB port on your computer or other USB device) is useful because it allows for the computer on his knees, on a bed or on a sofa, without that it overheating: in fact, the grid below the fan allows air to pass and the thickness of the cooler means that the PC is not glued to the fabric of the bed or sofa. A support so convenient, that they're used on or off.
Note this: if your laptop overheating is probably that dirt came stick inside on his radiator and / or fan. I advise you not to delay and open it carefully: you'll discover a thick bunch of fibers and dust. If you do not, your PC will become unstable, will turn off all the time, and can even melt.
