Pros.
1) Processor: Hexacore processor with 2 gb ram its Incredably fast.it can handle heavy games with ease.
2) Battery: Standout feature of the phone.Battery life even with constant net usage, videos, gaming.it can last 1.5 days easily. So with moderate usage it can almost 2 days.
3) S-pen: It is quite a useful tool for smart selection and to make immediate notes.
4) Camera: Quality impressive in day light.in low light flash is powerful enough. It fulfills the requirement.
5) Display: Amazing clarity.nice colour saturation.with 720p display and 267ppi no pixelation is noticed.
Note: Its does comes with a gorilla glass 2. Ask the dealer to show how a gorilla glass works. It will prove.
6) Software: The phone comes with a kitkat update so no problems now. Excited for the lollipop upgrade though.
7) Speakers and Audio Quality: Speaker is at the bottom right corner so its not that bad but bit low.Headphones sound is good enough.no complaints for headphones.
Cons.
1) Not much.There is a minor lag sometimes but its just unnoticable.