I have been using this for a month and I can say Its GREAT.!
When The Name "Samsung Comes to our minds, We Usually Think about great technologies but with laggy devices with poor batter lives. But This "Perception" might have to change in the upcoming days.
They worked really hard on this one, on the J series with providing new features Like "Ultra Data Saving Mode" And "Ultra Power Saving Mode" and both of these come handy in regular usage.
Ok First let me give you a Brief description of the phone.
It contains a 1.5 GB Ram with Exynos Octacore Processor clocked at 1.5 GHz, 13 Mp Rear Camera with f/1.9 aperture with LED Flash and Front Camera is 5MP with a Front Flash.
16 GB Inbuilt Storage(14.82 GB is Usable) and You always can add any extra Memory to your phone with its memory card slot expandable upto 128 GB!
Battery Capacity is Huge with the amount of 3000 mAh(Easily Lasts 1 to 2 days with regular usage)
And You will easily get a Standby time of 2-3 days(If you enable Ultra Power Saving Mode, Then There Will Be 5-6 Days Easily).
Overall The Phone is Great, Not Experienced Any Lag So Far, Battery is performing great up to its standards and High End Games are playing buttery smooth, What else you need! Go Grab it.!