Problem: In my drive to stop my computer from overheating, and crashing. See This, I purchased the Aluminum Bytecc cooler from newegg. The highest rated notebook cooler by newegg reviews. Suggested for 17 inch models... My Machine: Rev A 15" Macbook Pro 2X 1.83ghz 2gb Ram 100 Gb 7200 RPM Hard Driver (more heat than 5400rpm) 128mb video etc... Before using it, running a DVD for 20 minutes under OSX, with the computer open.Temperature Monitor reported a CPU temperature of: 1. 67 degrees C for one core, 152.60 ° F. 2. 71 degrees C for the other, 152.60 ° F. 3. The Area above the speakers is uncomfortably hot to extended touch. After applying it, running a DVD for 20 minutes under OSX, with the computer open: Temperature Monitor reported: 1. 60 degrees C for one Core, 140.00 ° F. 2. 61 degrees C for the other Core, 141.80 ° 3. The Area above the speaker is warm to extended touch Summary: Numerically, the temperature difference is not great (about 12 degrees F), but the machine does feel cooler and more stable. Performancewise, I don't notice a change. This thing has always been fast! I refuse to test if the computer crashes (running it closed with the cooler). I will assume it does not crash with the cooler, but I will see what happens the next time I accidentally leave it running closed with a disk in the drive. Update will come if I ever do make that mistake again. Just from the basic numbers I have reported, I highly suggest this machine, as it does make a difference!