Really, that's exactly what I expected: a practical, handy ... Small downside: 1 / must keep hold of the button to make it work: shame, so he must use both hands to both make it work and build on what you put into it ... blah, 2 / we feel that the engine is a bit feeble, should not be overstated. But overall, it's better than a large robot that we must go out, clean, not practical at all; there at least that's small, easy to pack and get out;