The weak points ... there are many.
I have the "luck" of having several floors, floor slabs, a laminate floor, flooring, carpet and tiles. It is not luck, is that I live in an apartment ... This is due to the result of my review.
I'll start with the problem of the suction head is too flat: the bar before brushing brush is too high and the wheels are too small to enhance the whole. What is really damaging (marks on parquet and laminated floors) and extremely noisy (not great for neighbors that plastic noise clattering):
1 The head scrapes the ground on the pavement, tile and parquet.
2 It is downright suction cup on the laminate floor and the brand when pulled to release the suction head. I'm not talking about the carpets ... a battle force (a sure way to build muscle biceps or break his nose).
It would have been seen to provide a button to adjust the suction power. And yes, the vacuum cleaner itself is very noisy, but not enough to bring earplugs.
Everything's still large spare toy. Strong smell of heated plastic in the early trials, fortunately, it is fading rapidly.
So for me and basically it is really not the top vacuum cleaners.