I've been using it for a while and it works as advertised.

Good show on their part for having the color temperature ramp slowly so you don't get whiplash.

Bad show on their part for thinking that moving many hundreds of degrees Kelvin in about 20 seconds is anything approaching slow enough. It should approximate the amount of time of twilight, or maybe double that, starting when the sun starts to go below the horizon. (Seems like there ought to be a technical word for that, but I can't find it.)