So far so good!
Just got my phone and completely charged battery before play. It seems incredibly fast and I love the screen like many have said. I do see quite a bit of bleed though in the upper left corner. Other corners aren't too bad.
I have had one reboot so far as well
When I got the reboot I was playing with wi-fi. I made a call over wi-fi calling and it sounded odd so I turned off wi-fi calling and tried to call back. The screen went dark and rebooted. I was using ADW launcher as well.
I am coming from a Vibrant and love the colors! I also noticed that my vibrant had a bluish tint to everything so whites look white now! The black levels don't bother me as much as the blue tint bothered me on my Vibrant.
So far loving this phone and can't wait for the mod community to ramp up!