It is highly optimised version of mobile with specifications like exynos 7870 octa ( ocrta-core 1.6 ghz) with gpu mali-T830 and 3 gb of ram.
The screen quality is superb with super AMOLED 401 PPI 5.5 inches in size.
Camera performance is also upto the mark with 13/13 with LED flash and video recording nof 1080 @ 30 fps.
It has aluminium body with front glass with a superb distribution of 181 gm weight.
It has a dedicated slot for microSD expandable upto 256.
Almost all the sensors including a fast responsive fingerprint sensor( front mounted) is included.
Battery( 3600 mAH-non removable) life is about 1.5 days with everyday normal use and about 1 day with very heavy use.
The optimisation of this device with such specs makes it a very good gadget with a feel of flagship killer.