Best upgrade I ever made
I bought the 128Gb variant of the Crucial drive and replaced the hard drive on my MacBook. It's made such a huge performance improvement; I'd highly recommended SSD drives to any laptop user. I've noticed a particular improvement in running VMs (especially XP) and IntelliJ (when it goes off to index stuff, for example).
The capacity could be seen as a bit limiting, but once I put all of my videos and other large documents on a NAS, I've not been complaining.