Back Story: I bought my MacBook Pro this year with a 128GB SSD. It's FAST but, all my libraries are stored on my 500GB G-Drive mini. I'm beginning to notice the minor inconveniences of carrying around an extra Hard-Drive. Solution: OWC Data Doubler w/ 500GB Seagate Momentus XT Hybrid HD. I chose the Momentus XT because it's suppose to be the closest thing to a Solid-State Drive without paying more than $1000. It's a 7200rpm HD with 4GB of NAND Flash memory which learns what files are used most frequently, moves them into Solid-State and speeds up performance. Questions: 3 Main Concerns 1. Battery Life (Am I still going to get the 7 Hours Apple advertises?) 2. Noisiness (Anyone with experience... Is a 7200rpm HD Loud? If so, any recommendations on a different one thats quieter?) 3. Hotness (Anyone with experience... does having a second HardDrive make your Laptop unbearably hot? This one is the least important or MAYBE the most important [since my MB Pro already gets REALLY hot sometimes].) Any other advise anyone would like to offer is appreciated.