I’ve been using it for the best part of a week now, and I’ve found it to be very useful. I use computer throughout the evening to listen to music and surf the web, but the last thing I need is a direct hit of ‘sunshine’ just before I go to bed. With F.lux my screen is already matching the lights of my flat – giving a much more mellow orange glow, rather than an intense blue one.
As well as the time related features, I’ve also found it quite helpful to set it to the 3400K mode in the day when I’m coding.
I have yet to find a keyboard shortcut for the ‘disable for one hour’ option, but I looks like the application is under (fairly) active development, so new features will hopefully be added over time.
I can totally recommend this software.
* It’s also available on ‘Linux’ but I don’t know anyone that is currently using Linux as a desktop operating system (apart from Doc John…)