is it a good NB cooler

Hi, I want to buy cooler for my laptop. So I went on search and I found one cheap cooler.

Size: 300 x 230 x 13,8 mm Noise Level: 20 dB Air Flow: 28 CFM Fan Speed: 1500 RPM Bearings Sleeve Fan dimension: 60 x 60 x 10 mm (3 pcs) Weight: 450g Power: low DC 5V Connector: Port USB 2.0 & 1.1 Material: Aluminium & Plastic Power Source: Via USB Port Color: Black & Silver Compatibility: up to 17" notebooks Warranty 2 Years Service Life MTTF at 40°C: 20,000 h

So, what do you think. Is it good enough? I have 15.6" but as I can see it is up to 17". So is there any difference in size? What would be diference if I use lets say 11" netbook. Tell your opinion form technical side :)

Thanks

A link? specs don't say much.

it's not english site, so i don't think that you would understand

It should be just fine as long as it keeps your legs cool, laptop coolers are just plastic with heatsink material inside and a couple of fans.