I'm currently running a mid-2009 MBP with 2 GB RAM and 2.26 ghz core duo. It's been upgraded to snow leopard from the original leopard. I've been thinking about upgrading to Mountain Lion to take advantage of some of the newer features (just got an iphone 5, so icloud is enticing). I know that Apple says my machine meets the technical requirements, but I've heard that 2 GB RAM may not be enough. I'm not technically knowledgable, so I wouldn't want to replace the RAM myself. Is upgrading worth it?