In my 2011 I5 MBP 13: I knew it wouldn't speed up the computer drastically but I wanted a bigger HD and the 4gb ssd is a bonus. I replaced a stock 320GB, and also bought 8GB of ram. My boot up time prior to installing the new HDD was averaging 1:15 with the Hybrid drive I am averaging :40. I haven't installed the ram yet I want to see the improvements in stages. I know I could of gone with a SSD but I wanted 500 or more GB and didn't want to spend the money on a SSD and or remove the optical drive. $90.00 for the Hybrid and $75 for the Ram for me is the most cost effective way to improve performance and storage.