Having fun with mine. The LTE is definitely nice. I'm getting speeds in certain areas that match my home cable internet. Otherwise it's just faster in general. Here at work, I usually get less than 1mbps. Now I get 5-6.
I know Panorama isn't new, but it's definitely been refined now that its been integrated into the camera. Got this over the weekend at the Waterstreet District car show.
My only gripe so far is battery life. Compared to my iPhone 4, its definitely not as good. But even the 4S had worse battery life than the 4. I just have to be more active in conserving my battery.