The G- Note is the best Android phone on the market right now, in my opinion. I actually switched from Sprint to At&t to get this phone and I won't look back.
The screen is simply brilliant, and the size is perfect for every task you need a phone and tablet for. It truly replaces the need to carry both devices. I have not picked up my G Tab 7.0 since Sunday, and my ever capable Epic Touch GS2 is now up for sale.
I purchased mine Sunday on a two year contract, but will early terminate the contract as soon as this phone becomes available on Sprint (I can tell that I am going to miss my unlimited data). At that point I will sell this At&t version.
I figure by that time the phone will probably ship with Ice Cream Sandwich, but really it doesn't need it. The phone is incredible.
I believe if anyone uses the G Note as their everyday phone, then it would be hard to go back to anything else.