I reviewed a number of Sigma face brushes yesterday, and you can read that review at the link. It also goes into more detail about Sigma and the brushes, but to sum up: I ordered fourteen brushes (and received a bonus 15th brush), and most were very good, a couple were great, a couple were fine but I’ve seen better, and a couple had mild defects but Sigma replaced them quickly, at no cost to me. And I’ve had similar issues with high end brushes. Overall, I think Sigma has a very good line of brushes – great when you consider how well they compare with far more expensive brushes.
I bought a collection of Sigma brushes a couple of months ago, and that gave me the chance to get a sense both of quite a few individual brushes and Sigma brushes in general. I’m reviewing them in two posts, one focusing on the face brushes (powder, foundation, blush, etc.) and the second one focusing on the eye makeup brushes (read it here).