I have been using E3 for past a year so I consider myself good enough to provide you a deep insight regarding every aspect of this device I will tell you the actual user experience because the system specs you can get it form various other sites etc. etc.
So lets begin,
The first thing which attracts you to this device is the brand itself its a "SONY" device with an excellent built quality of hardware and firmware which is integrated with OS Android 4.4.4
the device is slim and sleek with nice back panel made of comfortable material which feels nice when you hold the device, and of course the power button on its side just adds tons of look’s to it.
Battery: Stamina Mode(A genius creation)
E3 will never disappoint regarding battery life it has the most amazing battery performance you will not find your device being switched off when you need it the most.
Camera:
The rear camera is quite well it takes nice shots with sony’s camera optics algorithms it will help you take nice photos and videos in different modes.
The front camera is quite disappointing 1.3 MP if you are a selfie lover forget this device.
Performance:
The phone never lags, its response time is quite good you will be able to run heavy games easily.
Storage:
Internal storage is not that good you will be able to install only a handfull of apps even when you decide to move app data to sd card.
That’s it I hope I have briefed you regarding E3, the decision is up to you see ya later.