I have a similar experience with the Nexus 5. The photos look good. But the ergonomy is horrible. It isn't a camera, it's a smartphone. I can't hold it still for 5 seconds. And I almost always block the lens with my hand because they put it in the corner. It's great for taking shots of cats and having it always on you but if you ever used a good camera, then it's no replacement for a real camera.
Certainly those on the page seem to be very noisy and strangely lit even when scaled down to thumbnails. i dunno, maybe it's like "hardware instagram".