This was my first One Plus phone and the quality was awesome much better then Samsung phones. Good battery life, Stable Operating system and regular upgrades. The build quality is also really good. OnePlus although a small company has crafted a quality product for budget phone users.
I used the phone and then gave it to my younger brother who is more of a game geek and the phone delivered to his expectations too.
The only challenge is the phone heats up if you do a lot of gaming.