Did my OnePlus One for over two weeks bought via the Invite system. Invite the code I've received at a cost of half an hour on the Twitter search and a request. So it is not necessary at this overpriced prices to be paid at Amazon. The mobile phone is huge, but is still well in the mobile phone. It works with value and the display is very good (just provides the black level reason to complain). The operating system runs smoothly and energy-saving. To get loose despite Hardcore use throughout the day. My delivery has neither a yellow stick, still is the call quality poor or too quiet. The camera takes better pictures than my Nokia Lumia 920. All in all, I am very happy, especially because I have paid here just half the money as for a regular flagship model. On top of that, I find the OnePlus One design technically just beautiful. Many cheap smartphones disappoint known in this regard.