The opening post mentions Taklon bristles. Taklon isn't a single type, there are a number of grades, from the familiar standard "Golden Taklon" used in some very ordinary cheap brushes, up to high-grade synthetic (eg. Roymac's "Revolution Taklon) fibres which mimic the characteristics of natural fibres. The higher-end Taklon brushes are good, the average golden taklon ones, not so much.