It's perfect...when it works. I really like the scheduling  the color filter  and easy adjustment from the notification pulldown. But it turns off seemingly at random  mostly while using the default chrome browser. (not enough data to tell if it's that app specifically or just a limited runtime) So I'm doing some late-night research  and all of a sudden the screen jumps to full-white and about 3x the brightness!!! -2 stars for that.
October 15 2016