Positivity:
2GB RAM makes the phone faster.
Good design.
Upgradable to 5.0 Lollypop
Negitivity:
Battery drains sooner.
Heating issue.
I am using this phone from 8 months, design is good, Zen UI provides you the better Graphical User Interface, its easy to use but, the most biggest draw back is the battery issue, if the user is a 3G user then the battery does not last more than 3 hours, phone gets heated up on continuous usage for half an hour and the speakers are not loud.
Do not buy if you are looking for long lasting phone. Hope my review may help you.