The brush is very soft and I don't find it unpleasant to use at all. I use it to apply my moisturizing serum to my entire face after using lotion. My BA recommended using it with a primer afterwards, but I don't use it because I want to keep it separate from my skincare routine. When I use this, the adhesion and fineness of the primer and foundation are noticeably different. The finish is surprisingly beautiful. I think this is because the thin, dense bristles are designed to allow the serum to fit into pores. It's a little pricey, and if it were 3,000 to 4,000 yen I could have owned two, so I regret buying it, but it was a brush I'm glad I bought.