I've been.using HTC One M8 for the last month or so and was intrigued by oppo design and that brilliant notification light so I thought I'd take the plunge.
Here is my initial impression.
Camera quality better
Bigger screen and less real estate wasted
Better notification light
Speakers impressive and very loud possibly louder then M8!
UI half baked
Capacitive buttons invisible barely noticeable
Not bright enough
Camera software minimal not enough features
No development support
Overall interesting phone but software lets it down. Potential is there and awaiting custom roms, CM, Miui etc which can unlock the potential of this phone. However I have my fears it might not happen.
I prefer HTC One M8 it's more complete, polished phone hardware and software wise and that's reflected in the price. Is it worth the extra 180 hmm no.