Low price / value for money
Many reviewers explicitly cite the brush's affordability as a key reason for purchase, often buying multiples or restocking because it is 'cheap' yet performs well.
Precision for detail work
Buyers sought a thin, tapered brush specifically for small areas like aegyosal, tear trough, and triangular zone that other brushes couldn't reach accurately.
Repurchase / brand loyalty
A large number of reviews mention this being a 2nd or 3rd repurchase, or buying multiple Fillimilli brushes because they trust the brand's quality.
Social media / community recommendation
Several reviewers mention discovering the brush via YouTube or Twitter recommendations for aegyosal contouring techniques.
Sale/renewal discount pricing
Some buyers stocked up when older-version stock was discounted ahead of a packaging renewal, citing excellent value.