The Onyx heads are really interesting play with. They obviously have a very dark, wet sound, but not as much as the Hydraulic range. There is still some nice treble in there and it gives a very nice balanced sound when tuned correctly. The textured coating also give you the opportunity to do some nice brushwork around the kit. It's not ideal in terms of versatility, but it's a great head for specific projects. If you're looking for something different for a side project, I would recommend them.