I just took my MBP (2010 17") from the stock 4GB to 8GB with memory from OWC. I was getting page outs before and run a virtual machine on occasion so my memory usage was sometime hitting the edge. Best $47 I spent! . . . Now if SSD prices would come down someday I'll go for one of those also. I want a 500GB one and they are a bit too pricey at this point.