I would Say only one Word ***ULTIMATE***

UI - Best in Class
Camera - Best in Class
Built Quality - Best in Class
Screen Resolution - Best in Class
Sound Quality - Best In Class
Battery could have been better, but good for a Working Hours with all required operations.

My observations are based on with experience of other phone used by me, my friends.

The product is awesome and running smoothly. The camera is v good and takes great pics. Processor is fast and enable multitasking easy.

Like always Asus put good effort to make this phone in class,
Total phone features are good, but I disappointed with the performance of Rear Camera, it don't look like 16MP camera and photos click buy it is so dull.
and so many old features from asus removed, Like Music app, different features are the main moto behind this device.
There are so many mistakes happen with this phone...
AND you can only use Nano Sim or Memory MicroSD card, no both at a time.
There is no Force 4G settings on net...

I have a great experience using this phone. The phone does not lag anytime, excellent optimization of Apps, Excellent UI, Design, Performance. Truly satisfied with this phone at this price. Built quality is also very good. Though speakers are decent, a good overall package for this price.

A great phone in this offer price of 14999/-
Look is elegant,ui is smooth and attractive with all needy apps inbuilt.camera is also good with hand full of modes,battery normally lasts for a day for normal usage..

Mind blowing and incredible phone..I used Sony c4, moto g4,samsung a7 before using asus.now ZenFone 3 beats every phone in all segments..
1)Display is crystal clear and very bright even @ noon sun.brilliant clarity.this is revolution in mobile display where previously I used to struggle with display @ sunlight.
2)Speakers are loud and clear even @ traffic and outdoors.and earphones are superb..boom bass and you will be immersed in the world of MUSIC SOULS.
3)Gaming is as easy you feel like pl...

Phone goes silent for incoming calls. It works well everytime after a restart. But the problem resurfacing every 2-3 days. Should have gone for a Samsung phone. They at least have a good servicing chain

The best phone in the budget. Very impressed with the sophisticated yet sturdy build quality. Camera is wonderful. Phone is damn fast, got updated to Nougat via Wi-Fi, battery lasts the entire day. No bloatware. Very slim & compact dimensions. Recommend using a cover as the outer body is made with glass.

Pros: first update as soon as you recieve to latest Android 7 or most features wont be there.
Tap to lock, tap to wakeup, laser next to camera recognise face, best camera at its price.
Fingerprint works very well.
Beautiful design better but similar to iphone 7

Cons: battery drains fast
But fast charging.
If you hardcore gamer or movie viewer then battery will annoy.
Its excellent if you simple work user with apps like email and whatsapp.

Final two best points, You will fall in love with it...

A brilliant allround premium phone...got at unbeatable price on offer at Flipkart
Battery easily lasts two days. Performance comparable to my Google Pixel with twice the battery backup and some great features.