I have had my phone for a week now and I am pretty pleased with it...
The only thing that bugs me is the battery life...I get about 10-12 hours of use (fully charged at 8AM and down to 15% by 5 or 6)....Just regular every day stuff, mostly emails, txt msgs, facebook, a few light games (words with friends, etc)...I have Juice Defender, brightness is set to 20%, and screen time out at 30 seconds)...I ordered 2 extra batteries from Amazon so that should help.
I love the screen size, the LTE speed is awesome and the overall responsiveness of the phone is great (compared to my iphone4)...I thought I would have a hard time adjusting from the smaller iphone to this one (it just seemed almost 'too big' one I first looked at it), but that hasn't been the case...
I am using Go SMS to address the issue of pictures that are received via MMS being played back as a video (Whose bright idea was that???) and the ICS keyboard app (the space bar on the stock keyboard was too small and I kept hitting the period button all the time)...might need to learn how to swype...I tried for a minutes and didn't have much luck...heard you need to use it for a day or two before you get good at it...
Anyway...that is my 2 cents worth...
I am definitely keeping the phone.