The installation on the chain was super easy, this one takes the upper part of the housing from, and pushes to the central wheel on the chain - so it creates a prima guide the chain through the wheels. After a few turns I saw the chain finally flashing beautiful metallic. Completely clean the chain was not after the first application, however; desweitern must be yes a little dirty to clean up a bit different, ergo:
the dirt is rapidly distributed in the body, which limits the cleaning effect. For me, however, the pollution was extreme, and the device itself can also be cleaned quickly. A nice point, that the unit cleans the chain also at the inner-lying places with long bristles, where you can not reach with a sponge.
A total of four stars - coarse dirt such as mud or dirty fat can thus be quickly and easily removed. But remained a slight film of dirt, which still needs to be wiped with a cloth.