Clearaudio ceramic bearing upgrade

Anyone tried it? What's your impression? I assumed it would create a darker background and probably more dynamic. But what about wear? Ceramic will be harder than steel and will wear out the steel shaft and thrust plate faster, wouldn't it?

Clearaudio (or Musical Surrounding) wants an even $100 for that ceramic ball bearing, not expensive, but not cheap either. Are there good sources out there that sell comparable quality ceramic bearing for less?