I bought this mobile 2 years back on amazon.Positives and negatives of it are as described below.
Positives:
1) Rear camera is good when you click pictures in good background.
2) Performance is good for heavy usage.
3) Sound quality & clarity are better because it has dolby atmos sound feature.
Negatives:
1) Front camera is not good even in good background.Camera is not good under low light.
2) After 1 year battery drains fast as compared to initial drain.
3) Mostly there is a touch problem.I observed that most of the lenovo vibe k5 mobiles has touch problem at the time of initial launch of mobile because after bought it most of mobiles touch not working.
4) Performance of mobile starts decreasing after 1 year of usage.This mobile is better for using 2 years only after that there will be so much of problems that will encountered to it.