The Sony Xperia Z3 is amazing. Primarily, it is the speed, what distinguishes this device. Jerking or hanging there is not. The battery life is the second most important criterion, why I would choose again exactly for this smartphone. In normal use to get loose two days out of a charge. (Normal: Whatsapp, Facebook, Youtube and short calls) through various settings you can optimize the battery life further and gain more maturity to do so. The camera takes excellent pictures and has many gimmicks on board that can be really fun. Small shortcoming on high level: In low light, the optimization could be a tick better. The speakers are very good compared to the smartphones that I have ever met. The built-in LED flashlight is a great method to detect immediately whether someone has written what. Still, one may determine the color of the LEDs: I have at Whatsapp green and blue FB = "wow how originel". The processing is very robust and high quality. 2 emergency landings has already survived the device! In addition, it is supposed to be watertight, which I myself have not yet tested ..
In summary, I can only recommend the device. Considering what had long fürn I suppose Smartphone and to this day I do not regret my decision!