Samsung you have changed the design so much a thing you get 21topo ke salame you deserve it samsung lets start with Pros and Cons:
PROS: 1) Screen 2) Performance 3) camera 4) Samsung pay 5) Fingerprint sensor 6) Fast charging 7) Wireless charging 8) OS 9) After sells support
CONS: 1) Battery 2) Memory card
Screen: samsung has taken best display of the world so its best and it is a quad HD screen so best in resolution
Performance: it is having a Exynos which can genrate pixel till 4K resolution so GPU is totally relaz in 2K resolution
Camera: it houses a 16 mega pixel sensor which is great in all conditions so dont worry about camera it as a apture of 1.9 which is good and front camera us amazing it is in class fir that
Samsung pay: recently apple pay android pay was popular so Samsung launched its Samsung pay which is NFC & MST based so dont worry to forget your cerdit/debet card
Fingerprint sensor: its very fast and accurate and its accuracy is over 90% .At home bottom it is good place to settle because you can unlock the phone if its on the ground
Wireless charging: its the most creative innovation in 2015 and you can charg your S6 in 2 hours from 0% -100% with Wireless fast charging
Fast charging: its very useful feature because apple iphone 6S doesnt support fast charging abd S6 charges in just 1½ hours or 90 mins from 0% -100%
OS: Samsung uses Android but it is skined by TouchWiz UI so its very customisable and feature rich user interface so it’s a plus ponit
After sells support: Samsung has many service centres so that it is very easy to repair your S6 because a service centre is near your house thanks to the Samsung after Sales Service
Battery: in battery department the Samsung Galaxy S6 is behind because of a 2600 mah battery it should be minimum 3500 mah battery so it is a negitive ponit
No sd card: before this year Samsung was called as best friend of memory cards but S6 there is no memory card slot but it has more internal memory so mid point
OVERALL: BEST PHONE IN SMALL SIZE PRICE IS MID AND GOOD IN ALL SECS