I bought Lenovo Vibe K3 Note, with it AntVR Headset was free. If you want to buy it externally, then it was cost as Rs 1300.
Till now the reliability is awesome as it has very good lens and most important it is not eye-catching.
I recommend this to all users as it is very different very comfortable to wear in head.
I have not used other VR head sets but in this there is features for perfect balance of phone inside that phone so that you can watch the pictures automatically. To watch the videos perfectly my Lenovo phone has the feature of VR mode.
You can use it for watching two movies continuously because my personal experience was when I watched three movies continuously at the time of travelling, and I was a little but uncomfortable for wearing the headset more time.
With this price I recommend to buy this product because it is way better than the normal cardboard and you will have a thrilling experience while watching videos.
Style and design is nearly perfect as I personally recommend to make it a little more comfortable at the nose side as it is painful when you use for a long period of time.