Here's an idea, but ...

... In practice, unfortunately (at least for me) useless.
Basically the concept is indeed awesome, but arise while working with the Roller some "difficulties". The first thing I think of as the weight. Only the empty scooter weighs already more than double a conventional roller with extension handle. If this is then also filled with color, one must already be a little Arnie to emphasize (s) overhead the ceiling. Another negative point is the ink application. It is pressed each time you press the "ink transport lever" a small amount of paint into the roller. These can be found afterwards as small dots on the wall again, which must then be distributed with difficulty and with considerable force (I have, of course, without power and tried pressing strength. But that can not then ...). And eventually I got the impression with the scooter to need a lot more color. However, this is more of a subjective impression that I can not "prove" ... ;-)
Positive is the concept, the straightforward and easy to use and it does not (or hardly) injected during the application of color