I bought SIII last night. Last piece and that too opened for demo but only for a day. Anyway, the phone is pretty impressive and at a very competitive price of Dhs.2499. $680 w/o contract.
I installed my 16gb card and now have about 20gb free in total after having 100s of apps on it. Dropbox is builtin and using my existing account, it automatically increased it to 52GB (2gb before).
Feels little plasticky and one X has better outer shell but screens almost look the same. I've not seen anything clearer before even when i've checked One x in stores.
Dont know if one x has led notifications, but SIII has 4~5 different color leds to customize the notifications like sms, calls, gmail, charging, low bat, no signal etc. Even though they do tend to bleed through the shell but it's a nice thing to have.
Another thing is single SD card partition so you have in the beginning 11.1gb of free space on a 16gb model. So none of the app2sd apps are required as all apps are installed in this space. Would hope for app2ExtSD app where we can move them to extSD as well.
Rooting was breeze (if somewhat tiresome to search for at first on XDA LOL) and does it in a min. Heard about horror stories for OneX (was following it earlier this month on XDA forums before buying SIII).
I guess rest of the software features/tech is already been reviewed and dissected around the WWW so just wanted to point out about lesser known stuff.
Loving the phone and i had to trade in my ip4 32 gb for it