The Zefyr does exactly what it claims to do....keep Macbooks (MB) running cool. However, the design of how it connects to MBs should be refined. The short USB cable is the only thing that connects the Zefyr to the MB. It should seamlessly pair with a MB and move well with it in course of normal use (ie- moving from living room to bedroom). If you pick up MB without grabbing the bottom of entire setup, the Zefyr will quickly fall to the ground abruptly separating from the MB. My reco is to add a soft padded clipping mechanism to Zefyr that connects to the left and right sides of MB keyboard. That way it will be cleanly paired with your MB and easily travel with it as you go from room to room in your office, house, hotel... (Posted on 6/9/11)