Difficult ... but

In the end I am delighted.
It is expensive and from tests performed at me were not conclude. I even ended up dropping it, a heart crève given investment.
But there was little, I decided to take control. I put my house at best. And I discovered .... the ZIG ZAG mode. It seems that the latter is best suited to my interior. I am not in a modern house, it is very high ceiling and operate ZONE BY ZONE stopped this thing all the time. CRISIS.
But since I changed the way he vacuumed everything looks much better. What a great help when working full time.
So, overall 5 stars for efficiency, volume. An excellent companion.