Some stands have open ventilation on the bottom, or active cooling through fans. I've found these to provide temperature decrease. The way Lapworks states this stand helps cool is by providing a thin aluminum surface that will passively draw heat from your laptop. Not so much. If they cut some holes in it it would be cooler, but that's not really the main purpose - it's to get it higher.
I'm sure that the melting Toshiba and Dell laptops would benefit, but the Acer Core 2 Duo that I own actually runs pretty decent.