Nubia is a great company I ever seened in mobiles I liked it .
1.sound quality is best and the overall sount boost features I will rate it 4/5
2.yes this mobile is user friendly as it worth it.
3.style and design is amazing anx sleek better quality of metal is used .
4.display quality is awsm you can experience hd video .
5.yes this mobile is value for money as it is cheper in rate.