Played a bit with the RX100 this evening. Indoor, mid level light.
Focus is almost OK but goes a bit slow when on telephoto end.
To me, at the moment, the worst issues are the size and the handling. Despite having quite small hands I really have to keep the camera with the finger tips.
It's very difficult to get stable shots.
Sony worked hard to reduce sizes and weight. I'd pay for a bulkier (not bulky) body!
The lens dial is driving me nuts. If you change it's behavior on a mode, switching to another mode it carries the new function with it.
I usually set as "zoom" for movie mode and "standard" for PASM modes.