I bought a Mac Book about a week ago. I am really impressed with the operating system, and the usefulness of the computer. I need to purchase 2 GB of RAM (the 512 MB it comes with is not enough for power users). Since OSX is based on Freebsd, the feel of the OS feels really good. Freebsd is a free operating system. (In fact, this website is hosted of a Freebsd server). The history behind Freebsd is an interesting one and is a big leader on many internet servers.