That holder is a good solution if you wish to use your left foot for cowbell. It is enough bulky to keep it steady in the position even if you use a heavy one. There is a height regulation so size of cowbell is not a limit. The only thing you'll have to adjust really are the spikes. It is large item, you'll have to play with the hihat stand position to find your spot. All nuts are working well and keep the cowbell tight.
I use it for tambourine, cowbell or jam block. It's very easy to attach the pedal to it and it not takes long time. In general: good quality, sturdy Gibraltar product