I had to decide between this holder and a couple cheaper ones. In the end, I am happy I went with this one, because it's worth the money. It has barely moved since I fixed it on my bass drum and it's really reliable.
The only downside would be that it left some marks on the hoop of the bass drum. All in all, it's a really good cowbell holder.
Disclaimer: Just be careful not to get the screws too loose, because I did it and getting everything back in its place was tricky.