I have used this phone for 3 months. I have seen that the battery life of this phone is bad. Doesn't last long enough less than a day. The phone heats up a lot. The user experience is actually good because I like the way the operating system is made with no buttons and full of gestures which is good sign. But heating problems are there. And apps ecosystem is weak. And the Android support is not yet strong with the os. The good things are: good camera, great operating system, very good specs, good cellular reception, Good security.
Bad stuff: very bad battery life, over heating problems, weak app store ecosystem, over priced.
So it's an expensive choice to make.