I just purchased the Sony DSC-QX10.
Just the novelty of having this cool "toy" and being able to take photos where a normal camera can't...plus I also upgraded my cellphone to the Sony Xperia Z1S, which is a perfect match for this camera.
Would have loved to have bought the QX100, but it's a bit too much bite out of my wallet...the QX10's 10X optical zoom makes up for it though.
The only issue I have so far is there is a slight lag between the QX10 and my Xperia Z1S at times.
Not made for catching any immediate action shots, but stills & portraits are mainly the strengths to the QX10/100.
This definitely isn't a replacement camera, but an additional tool to add to the camera bag.