I tested all the high-end of the moment (iPhone 5s, Note 3, HTC One M7 / M8, galaxy s5, until all lumia 930) and although I was frankly very disappointed !! Average autonomy despite loads respected cycles, the screen display, despite a sharp assé unbelievable especially for reading a text, lacks punch for la.lecture video, a lot of reflection, push the brightness to max (and hello autonomy !!) But for me the enormous black that's all these "lags" slowdown (when you leave the app, browse the photo gallery, which got me to delete a photo without le.vouloir !!) which for me is really unworthy of a high-end !! A galaxy note 3, though older, is much more reactive, do not know all these downturns and is more self !! (and I'm really not a fan of Samsung !!) On the plus side: good design, space very well controlled despite a very large screen, Micro SD external storage by rather good photo removable battery, though no better than the S5 or range of Lumia, friendly interface with some handy features ... very disappointed though, the Note 3, the HTC one m8 the lumia 930 or s5 are much better!