Here we gooooooo!
Update 20120801 - 1141am: Everything is still looking good. The only issue I have noted is I needed to force a rebuild of my Spotlight database, but otherwise my Macbook Pro 15" seems a bit faster and less subject to some slowdowns I was having within the Chrome browser. Getting used to using the new features like Dictation, but loving the new iCloud connected Notes and Reminders apps.
Update 20120725 - 04:04pm: One small issue with the Installer. Install counts down with typical Time Remaining notice but then starts registering negative numbers (i.e. -9 minutes remaining). Eventually the Installer resets to "About 20 Minutes" and continues normally. I am still waiting for completion of the install based on this new time estimate.
Update 20120725 - 05:37pm: No major issues once installed.
Screenstagram screen saver would not work but failed gracefully.
Needed to install Java seperately