(1) the amazon description clearly states these are dimmable. The fine print on the bulbs clearly states that they are not to be used with dimmers. The bulb is correct, they flicker badly at any dim setting other than 0% or 100%.
(2) there is a fair amount of variation in the color temperature from bulb to bulb. Seems like between about 2500k and 3000k. Not noticeable except in fixtures (such as a bathroom fixture) with several side by side. Not awesome, but not a show-stopper.
Otherwise, build quality is really good, and they DO NOT FLICKER in on-off (i.e., non-dimmable) switches.