I have recently decided to go with a SSD for my MacBook. I have chosen an OCZ Vertex 2 SSD of 240 Gb. I was wondering if the performance push would be there, but instead, I noticed an interested effect of using a SSD: constancy. After migrating my old data to the new disk, I started my usual activity (lots of compilation, lots of small files). After a while, I noticed that applications launching was still fast. It seems that a SSD keeps everything constant and fast. Anyway, beside that, the prices are low enough to go and get a SSD; speed and silence are the two main benefits of using one.