4.5 Great cooling gadget! LizLen | 10/07/2011 | See all LizLen's reviews (1) Just got this & it's totally done the job. Really easy to use, powers away without any AC, just from the USB. It is working well and my old laptop is keeping very cool. Great value and free postage too. This has to be the cheapest one I have seen, saw same one in local major computer store for 3x more.