So in the right condition these fans work wonders. They are what you want, quiet yet powerful.The only down side I ran into is that when it's not on a flat surface air cannot be sucked into the fans. There is no back to the device so on a blanket or even a couch like surface the fans will rest directly on the surface and not be able to function properly.Bottom line, you get what you pay for and I'm happy with the product.