After two years worth of service its still going strong. Although now you may have upgrades tk this model in lenovo k4 and lenovo k5 notes but its flabbergasting for a phone to work so smoothly even after two years.
I bought it for 10, 000 back when it was launched on flipkart and got delivered within a day.
Usable ram is of 1.1gb while the rest is used by the system and usable memory is 8-9gb as the rest, obviously, is used by the system.
Regardless of which it has never lagged for me, albeit occasionally, but then again I dont game heavily.
Camera quality is nice and is manageable but only in good lighting otherwise quality suffers greatly.
Overall its a great purchase if youre using it only for work purpose.