I bought this phone from T-Mobile in black. It is absolutely amazing. The battery life, lightning-fast charging and crystal-clear resolution are probably my favorite features. I can't do it enough justice in words, but those who own it will know what I'm talking about. Just to give you a quick rundown of my observations:
Battery Life: From 100%-92%, 6 hrs 10 mins, 45 mins screen time (Heavy use, including videos, SMS/MMS every 2-3 mins, and S Note); Btw, this is on LTE, not WiFi

Charging: Plugged in at 15%, charged to 100% in just under 1.5 hrs (AC, not direct USB)
Speed/Responsiveness: Absolutely no lag while navigating the many features in this powerhouse. Also, from the moment I hit Reboot to when I'm back at the Lock Screen is ~15 secs
Misc: I quickly rooted the phone, mostly for TitaniumBackup, but realized that the phone allows you to "Turn Off" (equivalent to Freezing in TiBu) nearly all built-in apps... pretty awesome
With that, I do have a question for anyone else with this phone. I've tried several times to Scrapbook a YouTube clip and it doesn't allow me to play the video from the Scrapbook, as seen in Samsung's demo video. Has anyone had success with this? I've drawn a circle, box, and just about every other shape you can think of, but I just get a thumbnail when I look at the Scrapbook entry. I would appreciate any insight into this issue. Internet searches have not yielded any results, likely because of how new the phone is. I'm really hoping it's not a feature excluded from