Is this just a neat toy, or does it really help you sleep, concentrate & prevent eye strain? Anyone else here use it? Does it use brightness values that you'd expect, or is it sometimes too bright when it ought to be dim, or vice-versa?
As a side note, the effect that monitors and other bright lights have on preventing sleep is the suppression of enzymes in the pineal gland that convert serotonin into melatonin about an hour before bedtime. There's a deletion mutation in the genes that code for one of these enzymes (ASMT) that's very common in autistics and relatives of autistics (which is a non-trivial subset of hackers/coders/geeks), so you might not be benefitting from the darkness anyway. You can solve the problem more directly and reliably by just taking melatonin supplements.
I do end up adjusting the brightness of my displays as the night goes on, but I do it using a couple presets on my display.
It fixed a problem I didn't know I had.