I have used these clave for years now and apart from a few signs of wear, they are holding up well.
If you are new to clave, it will take you a while to get the correct sound from them, but just watch a little youtube tutorials like I did and you will soon be playing them well.
While these are good starter clave, they are not in the same league in terms of richness of sound as some others I have used, and are very high pitched, but for a few euro, I am not complaining.