First of all, let me say that I bought it because of its low price, but in the end, its price is a bit steep. Maybe it's because of the catnip, which was stale and my cat didn't like it very much, but I found the same product for less than half the price without it.
As for the brush, it doesn't stick to the wall with the tape that comes with it, only if you have a good double-sided tape. But even then, its shape is not right to fit in a corner or on a surface.

It functions as a brush and my cat likes its texture, but it stands difficultly and it's not worth putting screws for it. Now I use it by hand because I got tired of sticking it back every 3-4 days.

Overall, it's not worth it. It's better to spend a little more and get a regular brush or something similar with better quality.

It does what it says and functions somewhat, however the adhesive strips included are weak and fell off after 35 minutes. The only way to keep it secured is with screws that are not included in the package, and also the idea of a wall with holes for a cheap piece of plastic is not pleasant.