This thread is comical. It's as almost like it was purposefully posted as a fake review its so bad.
I am a new Apple Watch owner, 42mm. I went to update to OS 2.0 and found it was already updated, my battery lasts at least 1.5 days. I put it on in the morning and don't put it on the charger until like midnight. It's usually still over 50%. And I am playing games like lifeline, etc on it all day.
I have never had to reboot the watch. I can use it while I am working out, riding my bike, at movies in theater, I am missing less alerts, canned responses are awesome and fast, I get a lot of text messages and lifting my wrist to see them is awesome, it lets me respond to important ones and ignore less important ones, instead of looking at your phone and realizing you missed an important text. A lot of my friends have the watch so I get to send them drawings, and generally bug or annoy them. I have several band colors(sport) and they go with different attire well, especially team colors for football.
I have no problems controlling movements, screen, etc. and I'm 6'2 200lbs.
Love this thing. Not going anywhere.