Ceramic bearings simply move smoother. Hence, you can prevent losing power down to less friction in your bearings. Danishbike.dk aims for offering the best selection of cranksets, bottom brackets and pulley wheels for the most demanding cyclist. On the home page you can check out the selection of as well bottom brackets as pulley wheels and furthermore, tools for the mounting.
The Danishbike.dk home page also has a guide on how to choose the correct bottom bracket.