Pros: This harddrive is just as quiet as the 60GB harddrive that came with my 13" Macbook and I haven't noticed any hit on my battery life either!

Cons: None that I can think of.

Overall Review: If you are looking for a hard drive upgrade for your Macbook, this is the one. I read that some other reviews stated this drive was thicker than the 60GB, but this was not the case.