Hi, I have a late 2008 Macbook Pro, the first Unibody model with a 2.53 Core 2 Duo. It has an SSD in which made it significantly faster. I'm just wondering, for people who made the switch from a 2008 model to the Retina MBP, how big a difference there is? I know it's significantly more powerful, but I'm just wondering what people noticed the most from the upgrade, the most notable pro's (and maybe cons?) Thanks!