Hi, I'm new
I'm new here so I don't know how I should be posting, but I've been using flux sometime. I'm what some would call casual user. I first used it on Snow Leopard before migrating back towards Windows whenever Windows 8.1 came out. Anyway, I read through a couple of comments and thought that I may have some constructive ideas on the beta. Oh, I'm not sure if anyone covered these as well so...
First off, I haven't actually used the beta with my laptop's display so i can't tell you how that is just yet. However, in using it with my external monitor, I can say what I find useful.
*= major issue
[v] Backward Alarm Clock
[v] Use wider slider ranges
[ ] Software Mouse
[Slow: Natural Timing]
[ ] Use display data for better color accuracy*
Daytime = 4800K
Nighttime = 2400K
Bedtime = 1600K
Earliest wake time = 1.5hrs after sunrise (Astronomical+Nautical+Civil)
I figured is the best for the smoothest transitioning in my case at the moment. It's just like the sun I think. I'm not sure if this has any effect, but I think this option should be hard coded by default. Users can then decide where to go from there. I mean because that is when night/day more or less really begins. I just used this site for that. (timeanddate.com)
*The major issue I had with the New color calibration was that it didn't seem to work with external displays or monitor (at least the one that I've got). It made the monitor slightly (as in extremely slightly) blueish. It did improve the clarity of the picture. However, it ended up feeling very different than not using F.lux at all. It caused eye irritation to the point where I my eyes became light sensitive. This never happened before.
So, all in all, it's great so far. I'll give more info later whenever I get done testing it through different sources and comparing.
Just tested it out on the laptop (AspireV5-473P-6890) and the picture is perfect. The new color calibration method doesn't cause any issues over there. The yellow hue is solid white. Even at lower color temperature, the slight red hue evens out to be closer to white at night versus where it was before. Maybe, the external tv/display can't reproduce the colors as accurately because of the differences between them. Either way, I'll leave that unchecked when using it on the external. Later, I'll finish comparing several others.