Works very well,
This review is from: USB 3 Fan LED Light Laptop Notebook Cooler Cooling Tray Pad BLUE LIGHT
I had it for more than 9 months now, and I have to say it does a pretty good job of keeping my laptop cool.
When I got it, it was even cheaper and not even an add-on item, so for like £3 delivered it sounded like unbelievably cheap and I did not have great expectations.
Still, it's still working and works well.
I like that puts the laptop keyboard at an angle, which makes for easier typing and, while the size is just right for my 11", it's still usable with a much bigger and bulkier 17". Just, it will cool less I guess, and won't be as stable.
The feet have a good grip. Basically it's just a piece of plastic with 3 fans and three leds, but well designed for what it is.
The usb plug allows to connect a further usb device to it, but given the fans are already drawing most of available amps, I wouldn't trust it with say an hd or even a usb stick.
Weird final note: if you are thinking of turning it upside down, wire it to a 5v adapter and mod it into a magnetic agitator, the shape is just fine, but the fans would lack the torque to spin liquids denser than water (I said it was weird, but who knows, some might find the info useful)