Moved from an Xperia Z2 to this phone. Both use the Snapdragon 801 and yet the oneplus X is much faster and smoother. It's literally stock android with some settings for a dark themes and what not. That feel in the hand. It's such a cool phone. It's so well made. The battery life is excellent but I'm a bit spoiled by the Z2; undoubtly sony does batteries better than anyone else. The camera has given me good results; The rule is simple with the camera: Get more light. My Iphone 5s had a better camera no doubt. The display is just....perfect. I literally own a tablet and I choose to watch youtube videos on my phone simply because of how amazing this screen is. People often say it's an amazing phone for the price. I'm here to tell you it's an amazing phone. And the low price simply means more people can afford this beautiful piece of technology. I genuinely believe the display and build alone are worth the price.
Edit: I don't live in the US so I can't comment on the LTE band issue with AT&T and TMobile.
Premium-looking design, great camere and fantastic screen. What's not to like about this phone? Lacking a bit of speed because of the processor, but not too slow though. To the price, this phone must be the best on the market!!
Design, OS and screen - that's all what is in this phone nice. Rest of things like speaker, overall performance and daily usage is horrible for me. I know that's 200£ only, but specs looks much much better on paper. This guy is much much much slower then Nexus 5 whichone I had. For this price is good but for this specs is really horrible. I'm disappointed :(