I think Sigma brushes are a decent quality for standard day to day and some special occasion makeup. The major differences in brushes lie within the hair/fibers used. Good quality brushes work better in the sense that they make your job easier. I find that when I work with great brushes blending and technique are as vital. If you are using good technique and somewhat decent products the Sigma brushes will be a great addition to your collection. No matter what you buy or what you use, with makeup you gotta learn to make it work for you.