I had a first gen 500GB XT in a 13" MBP and loved it! This was before the price of SSD's drastically dropped. If you need 500GB, I think it's a great deal and is a very noticeable difference over a traditional 5400 drive.
I put that XT in my PS3 (after I got an SSD then my rMBP) and it made my PS3 UI slightly less laggy and installed games load up a little quicker.
I put that XT in my PS3 (after I got an SSD then my rMBP) and it made my PS3 UI slightly less laggy and installed games load up a little quicker.