Testing notebook coolers can be a bit tricky, as we have yet to find a reliable fan speed controller for our Dell XPS laptop (readers, throw us a comment if you know of something we can use!). Fan speeds on notebooks often work like this: a load is applied and temperature goes up, then the fan kicks up a bunch and cools the CPU back down, so the fan speeds relaxes, then the temps go up, and that cycle tends to oscillate during temperature testing. As a result, we've been better off monitoring the fan activity of the notebook, which has its own benefits. If the fan in your notebook (which is highly integrated and difficult/expensive to replace) isn't working as hard, it's a fairly safe bet you should see some lifetime improvement from it. Our old torture-test notebook has since succumbed to a graphics card failure, and so we'll observe fan speed behavior in different usage environments.
During stress testing and gaming, when the fan is usually automatically at full speed, we saw a slight reduction of the fan speed, where it would frequently dip to around 90% fan speed. Since only one of the fans is near the CPU and the GPU is located a bit farther forward, we didn't see quite as much of a reduction when compared to the coolers which had larger fans. The fans have a more noticeable noise because it's higher-pitched than larger fans, but with a notebook sitting ontop they're still very quiet. The vanes, which push the airflow slightly forward, created airflow that could be lightly felt on my wrists, which is a nice auxiliary benefit. The notebook surfaces were notably cooler, albeit only slightly, but the bottom was significantly cooler to the touch. The large aluminum top creates a large heatsink area as well, and combined with the airflow helps wick heat away from the critical components.