I am using this application since 5 months ago and I still dont face any lag in the performance of my Android phone.
This application do not consume so much data as the original Facebook application consumes and it also not effect the battery performance.
The application user interface is very nice and decent.
You can do pretty much anything related to Facebook.
The size of the application is not so large we can easily download it.
It is also available in many countries, it is also available in India so need not to worry we can download it easily.