I've tested them pretty heartily - they are really top notch at $9.25 a piece.
The dimming will accept values down to 1% but like almost every other bulb it's more about 8%. The colortemp is really nice and accurate to me!
Also - i discovered this at Home Depot - another option ; for $4.99 ea - a steal!
I haven't received them to test but can't argue with the price!
Finally I tried like crazy to get LinkInd dim/cct a19. ($12.99 for 2) If you go down that road, you learn they can't be acquired in the US because they aren't yet approved. They are available in Europe - but you get the e27 base (27mm vs the 26mm [e26]). As some already know but I'm sharing - USA e26 sockets can accept a e27 OR e26 bulb as it was built into the specification.
Probably could find out at the zigbee alliance if they're registered. I wouldn't recommend them if they're ZLL unless you put them on their own hub. Sengleds are fine.