Now for Smartphone:
Appearance / level of craftsmanship: +++ WOW, I come from the Nexus 5 which is processed top for me but the OnePlus One goes one better. Looks great, the back is made out of a sand-like material (feels really good at). Here there is really nothing to complain about.
Power: I could here describe the whole specifications extensively, but everything is in the product description. For this but my impression of the performance in daily use: +++ there is nothing negative I would interpret the OnePlusOne. All liquid, all apps / games run top.
Making calls: good but not great. I feel like I'm my counterpart not listen particularly loud (at least when I'm in there no headphones). Otherwise no crashes or similar.
Battery: lasts me a full day (6 clock in the morning to 23 at night) without any problems (and I use it really very much).
Screen: +++ Top 5.5 inches Full HD, super colors. Actually, there is nothing more to say.
Cyanogen: Runs very stable overall. What I did not like (and what I've turned off) is the gesture control. For me, the torch is in fact regularly eingeganen while I had the phone in your pocket. After I turned it all is ok now. What I also noticed that from time to time when I receive a notification (this is displayed in the top bar) and I wipe from top to bottom, the settings are shown me but not the message itself. Is funny because it is not always the case (should any be a bug).
Conclusion: A smartphone with these specifications (64GB) for 299 euros (from the manufacturer) can not be beat for time.
I am very pleased and can recommend without hesitation all the smartphone to 300 (actually 400) Euro Search. The only hacking of the matter is that there at least until now only works with an invitation directly from the manufacturer at this price. Otherwise just a big bonus for the great piece of technology has to be paid.