Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best and easiest mac backup utility

This is so easy to use and does exactly what I need. So far I've tried Retrospect Express (way to complex and it has very poor documentation), Iomega Quicksync (just not powerful enough and it's not reliable) and the File Sync control panal in mac 9.2 (doesn't do simple one-way backup). There are several ways to backup, a simple copy file, a smart copy (only copies when there's a change), and syncronize keeps tracks of two versions and keeps both current. It's seamless and reliable. Strongest recomendation for mac-like ease of use.