Overall, the Arctic Cooling NC Notebook Cooler is one of the best on the market. Although we haven't reviewed a notebook cooler before on KitGuru, I have personally tested a few in the past and none could match the performance and refinement of this offering by Arctic Cooling.
At a price of around £15 at Quiet PC, the Arctic NC Notebook Cooler isn't exactly expensive so you'll have to decide whether the small improvements in temperatures are worth it. We would say that if you have a laptop with a very hot running underside chassis, then this will certainly reduce the temperatures and possibly increase the lifespan of the components.
KitGuru says: A decent notebook cooler at a reasonable price.