Originally posted by pentaxian_tmb I have been lusting over the x100s all year, but I see the GR as more practical and easier to carry.
My worries are: 1) low light abilities; 2) the dust problem I keep reading about; 3) whether the controls will be comfortable (I had the Q for a while and found the layout to be too squeezed, resulting in me inadvertently hitting buttons); and 4) color rendition.
I finally pulled the trigger on the GR in August, after months of mulling over the x100s and the GR. My main reasons for choosing the GR over the X100s where the size and the price. I wanted something truly compact. I have not been disappointed in the least, in fact I've barely used my K5 since. It's the perfect "carry everywhere" camera and fits nicely in my coat pocket or purse. I find that I actually don't miss the viewfinder as much as I thought I would.
To address some of your concerns:
1) Yes, the auto focus in low light is a little slow. I find the auto focus assist light helps considerably.
2) I have not noticed any dust issues with my GR.
3) The layout of the buttons doesn't bother me. Too some getting used to, but overall I'm comfortable with it and can't think of anything I would change. However, I'm a girl with small-ish hands.
4) I'm fairly happy with the colours out of the camera. Especially b&w. However with that said, I usually shoot raw and tweak in lightroom.
Overall the camera isn't perfect but I love it and do not hesitate to recommend it.