Review (1/5): Brush Head is not Very Good
I use microbrushes for painting fine details on models. Unfortunately, the heads on these brushes is not suited to this task. The head seems more like a tiny cotton swab than a brush. Brush head gets saturated and does not deposit paint in an even layer on the surface being painted. It's as if the brush head peels away, letting the stick surface touch the model and leaving streaks of no paint.
These may be very good for other applications, but for painting fine details they're not a good choice.