I'm over the moon with the KQ12B & KQ10B (KQ10B received as gift from store). I find KQ12B the more versatile of the 2 styles as it is larger and has the fluffier tips for ease of blending in my ourter v and crease, but both have been able to pick up all types of power formulas I've used them with, I've especially noticed with KQ10B the ability to build up pigmentation for the Natasha Denona Trio Chromes whereas other flat brushes I've used with the same formula seem to dullen the affect as i work the shade into my eyelid. Just noting also that no eye primer was used so there might be different experiences with placement than mine. I have also used KQ12b for Colourpop Supershock highlighter and that does a wonderful seamless blend and buff into my cheek bones.
