Time Machine

Time Machine is one of the many reasons I pay 3 times more for a Mac. It saved my butt again from my latest HD crash. This is my 2nd hard drive crash in the past 3 months. Moving your data, apps, and configuration between computers or between hard disks is a breeze compared to Windows. No need to reinstall your apps, copy your data, and reconfigure your machine. Just backup your old machine, restore to the new one, you're done. Everything is left exactly as it was. I no longer have to fear about getting a new computer because you can easily move everything to a new one and everything is exactly as I left it.