Criticism - perhaps because the manufacturer can still run a little facelift:
- The handle is a bit short; 5 - 10 cm more would be better for handling
- In a review here is that inside no round insert is present; I think you also need to not, especially since the cleaning of the container is erschwehrt thereby; It is true, however, that the brush is rarely completely straight in the container, because the brush head quite a lot of game in the container has (Tip: reinstellen brush and rotate, mostly it is then almost straight). If the brush head 2 - have 3mm more in diameter, the problem would be eliminated.
My personal conclusion: price and design convince with the criticisms I can live.