I already had two Rosie Rosa eye makeup brushes, but Shimada-san's application was so beautiful I wanted one too, so I bought this during the 30% off Beauty Day sale. I was worried because I had read reviews saying it was hard, but that's not the case at all! Compared to the Rosie Rosa, the brush is smaller, but overall it's softer, while this one has more firmness and is very easy to apply! I also bought the M size at the same time, so I use them interchangeably.