I have been using Xperia Z1 Since its launch.it has been more than 2yrs but still my phone runs without lagging or switching off by itself. It still gives nearly 2day battery life.
There are many more plus points. But this whole thing is my experience. That was when z1 sales went high that it set a new record with 5.8 million Sales in 2-3 weeks and 6.5 million in months in India for highest selling phone in a month in discontinued segmen.
