I bought LG Nexus 5, two years back and its still working perfectly fine!
Nexus 5 is one of the best phones ever made.
The display quality is too good but the only thing that bothered me was the display quality.
It shatters even if the phone falls on to the ground from a height of 30 cms, except that its a fantastic phone.
The camera quality is extraordinary Id say for the money we spend on this phone.
It has got a 441 PPI display, which is very crisp and clear even if you zoom the pictures to the maximum, the sharpness and the picture quality is restored.
It has got a 2gb RAM and that prevents the phone from lagging and getting stuck when doing something important.
The processor is too good, can handle multiple process with an ease and it just doesnt get laggy at all at times.
It has a 2300 mah lithiul-polymer battery, which is a not an apt for this phone taking into consideration the display quality and the good stock camera and the heavy applications.
Battery wont last for more than half day on moderate usage and 4-5 hours on WIFI usage.