Picked mine up a few hours ago after falling in love with the HOX (for 12 days). That's how long I had it and knew I had to upgrade to the 64GB and Tegra3. My cases still fit, and I think Sense and Sense+ are fantastic. I know why everyone raved about it now.
No word on battery life yet, but if it's anything like the HOX, I'll be thrilled. That thing would go much longer than the S3. And since I don't have LTE in my area (yet), it shouldn't be an issue at all. I do almost no gaming, so that should help, too. Besides, I'm compulsive about battery charging, so it's rare that I would ever have an issue.
This phone (based on the HOX) is a home run for me. So solid, feels great in the hand, perfect size for me, and the screen is much better than the S3 was.