I have very sensitive undereyes as i am 52 and the skin has been around the sun many times. The bk beauty brush applies great but is a bit shabby and pokey, the concealer brush in this set is SO SOFT! I cannot express how fantastic it is to apply/blend concealer and not feel the stabbies like before!
The rest of the face brushes are just as soft and i love the more dainty size as i don't like having to "fix" over application of cheek products due to the brush being large and blending getting out of hand.
The eye brush extension is fabulous. I adore the smaller sizes and the wee pencil brush, super handy and yes, super soft.