I purchased Oneplus X through an Invite on Amazon Earlier this year. The delivery was quite fast by Amazon. The Packing was very good.
The Phone comes with a 5" screen 3GB of RAM so multitasking is very easy. Storage Internal 16GB and expandable through a hybrid sim slot to 128GB that sounds good. Now coming to the OS, it runs on Android Lolipop 5.1.1 with OxygenOS 2.2.2 and will definitely getting the Marshmallow Update very soon this year only. Now coming to the camera, it features a 8MP Front Facing Camera and a 13 MP Rear Shooter. It has an LED notification light on top right corner which is customisable .
It also comes with notification slider for selecting the interruption modes. It comes pack with a non removal Lithium ion 2525mAH Battery. It comes with Hybrid Sim Slot with 4G LTE.
Overall the phone is good. I bought it for Rs.17000 but now it is available around Rs.15000. The camera picture quality is good in both indoor and outdoor conditions.