I am using this since from 2 months; first of all I like the design, slimness and style it has. Voice reception is no match to others (its crystal clear); if you are a tech geek, then there is a lot to try.
Battery is 2300 Mah I guess and if you run this one with out any applications then you can expect 3 days, but if you enable some of the apps then it will drain in one day or lesser than that. (of course apple iphone will lost only 7hrs); if you enable GPS then you can see the draining of the battery like a cheese on a hot pan.
Overall, I can say its worth to buy and try.