I definitely recommend this brush. It's synthetic Kolinsky, but I don't think you would miss the natural one.
With this brush you can paint perfect strips, it holds a good amount of paint, although I wish it holds more. Or maybe it's me wishing a different size. Initially, I wanted this brush for cleaning edges in my watercolor botanical painting, but I think it deserves a better job.
The tip holds its shape and springs back immediately. The ferrule looks high quality, and the wooden handle is just perfect in thickness and smoothness. It's varnished but it has some small amount of texture so that it doesn't slide from my hand as with other brand that I use.
In general, the whole brush looks high quality and works great. Time will tell whether it lasts.