Summary: I started off with the free demo then bought this for the serial number. Runs great on my late 2007 Macbook Pro. It has enough features for digital photo editing and touching up to make Photoshop unnecessary.
Pros: Awesome RAW photo editing tools, many fine tweaks to get the most out of every RAW file. Lots of tools for editing. Editing is non-destructive. Great user interface and library setup. Automatic backups of files available.
Cons: I just wish you could disable the 'graphite' override it does in appearance wise for menus and such, like the rest of Apple's pro level applications.