The interesting thing with the Zalman cooler is that the fans don't blow directly into the bottom of the laptop like most coolers do. The top surface just has a bunch of vent holes so the cool air is distributed evenly across the bottom of the computer. At first I thought this wouldn't work as well, but after using it I think it's actually better. This way my HDD and my RAM get cooled in addition to the CPU/GPU. Also, if you have a high speed fan blowing into the intake vent of your CPU heatsink, a lot of that air probably doesn't even touch the heatsink fins if the heatsink fan is not creating suction to pull the cool air through the machine. With desktops, the fans pushing air out of the case are the most important ones, and I don't see how laptops would be any different.