I bought Micromax Canvas A1, Android One mobile mainly because of its capability of latest updates of android system and I am quite satisfied with it. It has nice 5 MP Camera and 2 MP Front camera for selfie also. Storage is on the average side though which is 4gb.
Battery backup is good because I am not a heavy gamer. For heavy gamers there are many mobiles with bigger batteries in the market or you can buy a power bank. It does not hang while running some popular games like subway surfers or angry bird. 1gb Ram is quite satisfactory too. After updating to Android Lollypop 5.1 it runs more smoothly now. I will recommend this mobile to anyone who wants value for money.