I've had great experiences with these bulbs.
Great dimming profile, and good light color, the right "warm" color.
they are rated 100% to 20% dimming. They probably go a bit lower, no real flicker. When they get to the bottom of the curve they just go out. I have two of the 4" versions in my over kitchen sink cans. These flicker a bit when dimmed and there is UPB traffic, but I suspect it's the switch not the bulbs themselves. The other bulbs I had int here did the same thing.
They work great with SA dimmers.
I replaced every can light in my house except the ones on the cathedral ceiling (angled trim rings) with these, 50+ bulbs.
I have 3 outside in my porch cans (covered from the elements) the outside temps (slightly) below freezing and damp northwest air haven't affected them adversely.