First of all: I have for months an iPhone 5 and Galaxy Note 2 and for a week now, the HTC One (O2). It exceeds all my expectations. Much has already been mentioned in other reviews, so only briefly, what I especially noticed in everyday life: - Very high-quality and ergonomic housing (materials and workmanship on iPhone level, far above the Galaxy Note 2) - Clearly the best display (sharpness, brightness, color fidelity, black and white levels, viewing angle) - By a wide margin the best Lausprecher (position, sound volume) - Top performance (almost everything runs fast and smooth as silk, finally an Android device on iPhone level) - Great Camera for Photo and Video (image quality, comfort, functionality) - Extremely fast internal memory (copy this goes faster than the other devices) - Extremely comfortable keyboard (that of the Galaxy Note 2 also very good) - Battery life on par with the iPhone 5 (so good, but not as good as the Galaxy Note 2) Particularly stands out the HTC-browser, which quickly loads pages, text wrapping and offers on the Super display makes thus desktop sides finally available (on the iPhone 5 simply unthinkable). Many apps, such as Amazon, eBay, Sport1 ... I use no longer, because the sites are much better. The speakers and the display are so much better than the competition that finally makes viewing longer films really fun. Writing longer texts (like this one) is no problem at all, thanks to word-proposals, multi-configuration of the keys and the highly accurate touchscreens. No comparison with the catastrophic keyboard of the iPhone. 5 Conclusion: the One I find so much better than the other two devices that I did not take this and will sell again.
Addendum 26.3.
The whole housing is extremely insensitive ugly fingerprints, absolutely top! I have the HTC launcher replaced by any cost loose Nova Launcher, which provides wonderful liquid window animations. The HTC-music or video player I've replaced by Poweramp or MX Player, since they are much more powerful and more comfortable. Both I have sorely missed on the iPhone 5. I also have the free Adblock Plus installed to suppress annoying Commercial eg browser.