A few thoughts:
-This thing is FAST! Noticeably faster than the G4
-The "second screen" is cooler than I thought, and I can't wait to play around with it more
-The charger that came in the box is actually labeled "Fast Charger", which leads me to believe that its a real quick charge 2.0. Unlike the one that came with the G4
-The phone also tells you when its fast charging in the notification shade, which I appreciate
-The fingerprint scanner is kind of a bummer right now because all it does is unlock the screen. You're main source of security is still going to be a password/PIN/knock code etc. I really hope it gains functionality in marshmallow
-Mine didn't come with headphones in the box, which is what I've seen with other US carriers as well. But all the reviewers on YouTube got matching earbuds with their demo units.
-The screen is brilliant, and seems to be even better than the G4's in my opinion
If you have any questions or there's things you want to know about, let me know!