+1 for "changed my life." Seriously, but for f.lux I would probably have sought medical treatment for persistent insomnia. (And when I swapped laptops recently and stupidly put off installation I had two months of Zomg Schedule Hell before remembering "Oh yeah, this acharacteristic inability to sleep is exactly like life before flux".)
This is exactly my experience with F.lux as well. I haven't had real insomnia for about a year and a half now, except earlier this week --- I had reinstalled my laptop and forgotten to add Flux as a startup item.
