It seems to do well in various lighting conditions. I wonder how it does with a strong backlight. The Flip Ultra (original, not the Mino) did exceptionally well as seen in the video here:
http://www.degutis.com/blog/flip-vs-panasonic-sdr-s10/.

The Zi6 is on my list and if I get it, it would be the third pocket sized video camera I bought this year.