I have this cowbell for a few days now and I really like the sound.
It sounds very warm and 'full'. It is loud enough to be heard through the rest of the drumset, but (becouse of the pleasant, warm sound) not really 'cutting', so probably not the most recomended for heavy metal.
For all other music styles, I can recommend it.
The quality seems very good: no sharp edges, and high quality materials.
I found no bad points so far.