I had the Pentax Q and standard prime for a few months. I loved the cuteness factor, the appearance, and the controls. But the image quality just wasn't there. Resolution, colour, detail, and low-light ability were all horrendous. In my opinion, now that some micro 4/3 cameras are around the same size as the Q and have a plethora of affordable AF lenses to choose from, the Pentax Q only has credibility as an astronomical tool with telescopes, etc.
I sold the Pentax Q and bought the Panasonic LX100. It's not much bigger than the Q, and neither are pocketable. I was able to get the following photo with the LX100. I can guarantee you I wouldn't have been able to get a photo anywhere close to this quality with the Q. I don't think Pentax will continue with the Q system.
http://3.static.img-dpreview.com/files/p/E~forums/57352751/9b34e4e9bdce4a4e845484a67d6cdd85