Congratulations upd103! :congrats:
I must say that, IMHO, the jump from Gingerbread to Ice Cream Sandwich is nothing when compared to the leap to Jelly Bean.
So many new features and app's come bundled with it. I had to start re-learning my phone all over again. The Power Saving menu is awesome. The screen on whilst you are looking at it is good. Wi-Fi and Bluetooth have been improved. GPS is accurate to 3m... indoors for me! The new TouchWiz with Favourite Contacts and Favourite App's widgets is a big improvement. Even the modem on this is giving me a good, strong signal. Scrolling and menus are both smooth and fast I'm finding. The list goes on.
The plus point for SGSII users is that it is the Android 4.1.2 version which is a later version than both the Galaxy S3 and and Galaxy Note 2 are currently on.
I was initially prepared to give this pre-release version of Jelly Bean a quick look and wait for the official release, however, after flashing it, there is no way I am going back to ICS now! The developers seem to agree with me too as they consider this a stable firmware for development and there has been a number of custom ROM's based on this JB release, one of which I am using now.
So good is this release that I feel it is only necessary for Samsung to obtain the permissions of the various countries Telecommunications authorities and receive the amended versions, with, "bloatware", back from carriers and they will be starting to roll this out... hopefully within their, "Provisional Date", of November.