This has got to be the best brush I've ever bought. I own a lot of brushes, most from Chanel and Mac, but I've never had an eyeshadow brush like this. It's thin, not too big, not too small, picks up just the perfect amount of powder, can be used to tap e/s on the lids, or to blend it in. I've used it for lining under my eyes, it's a very very versatile brush. Somewhat similar in shape of Mac's 239 but this one is far better IMHO.
Oh yes, I love using it with pigments too. Wet or dry. I absolutely adore this brush and am gonna buy more MUFE brushes asap :-)