Apple claims it to be/have:

1. 2x Faster
2. Elegant User Interface
3. Easy Bookmarks
4. Pop-up Blocking
5. Inline Find
6. Tabbed
7. SnapBack
8. Forms AutoFill
9. Built-in RSS
10. Resizable Text Fields
11. Private Browsing
12. Security

Having rather controversial list of features, this browser does nothing but crashing on my PC

Maybe you will be more lucky to run it http://www.apple.com/safari/download/