[pdoconnell]

I've been using this for about a year now. It does seem to have a noticeable impact on my comfort given the time I spend staring at screens.

The transition points at sunrise and sunset are very disruptive, however. Even knowing it is coming, it will break your thought process.

[nkantar]

Really? I feel like mine take over an hour and I never notice them. I think that used to be a setting, but I can't seem to find it now.

(OS X, might be different on other platforms?)

[WorldMaker]

Did you try adjusting your transition time? You can switch from Fast to Slow which will gradually adjust over 60 minutes. See if that works better for you.

[pdoconnell]

I'll have to check, because for me its an immediate shift. It even causes system slowdown for a few seconds as it transitions.