I bought my first one about ten years ago and replaced it only now, it says a lot in terms of brush quality. Love it!

I have only ever bought these on sale because of the price. Works well but the ones I have have become a bit undone in 2-3 years.

I use it with the ABH brow freeze and my brows have never looked better.

I love this brush, it is fine and firm enough to be able to draw the hairs. It also holds up well over time (after using it, I clean it with a tissue, but I don't usually wash it as often as my other brushes so that I don't spoil it). It is my favorite brow brush out of all the ones I have. 

I purchased this brow brush only 2 months ago and the bristles are already starting to splay, which is a massive inconvenience when trying make your brows precise. Contacted Cult and there is nothing they can do about this.