Asus really changed the context of mobile phones by introducing zenfone 5 with a 2gb ram.
At that time even 1gb ram was considered as a great thing.
I bought the later version of zenfone for 7999 from flipkart.
pros
2gb ram with almost 1gb free for a normal user
camera-zenfone really do have a good lens from which we can take quality photos
intel processor- iam not sure whether its a con or pro, because in a gamers view point its not great, but for a normal user its pretty good
cons
battery backup is an issue-eventhough it have a 2100mah battery, it sucks sometimes, for a certain extent it can be rectified by using smartsaving mode on(built in feature)-but it wont be enough for a gamer like me:P
heats sometimes-thats a normal issue for a smartphone
no 4g-biggest drawback which iam facing now-while buying this phone 4g was yet to come and I never thought it will be available soon in my city! hard luck!