I've had several vacuum cleaners, last a Dirt Devil Bagless, but the filter set so too quickly that peak performance was not given, also, it was always a mess to empty the tank, because when you open the flap it again dusted the entire Apartment one - and each time the Mülltone to run in the yard is then not the point of it. Then I had a Ecologico Polti, a vacuum cleaner that binds the dirt in the water. So far so good, but in dog hair also failed this, moreover, it was also very expensive, only fill the container, then empty the vacuum after and clean.
The Siemens is absolutely outrageous. It has a suction power that I have never seen before, and that with the small housing and low weight. I finally get all the dog hair from the carpet, from PVC and from the sofa cushions. This created so far no vacuum cleaner (and certainly not at the price). Change bag when full, finished. Also cleaning is a real relief.
Although it is true that the rolls are a bit small and it can not go on its own cord without having about pulling him by force or the roll-up of the cable to the train system is a bit unfortunate, so for me is primarily the Suction crucial and which is still remarkable at this small handy thing, even when already filled bag.
So 5 stars for what I expect in a vacuum cleaner. The build quality is good, but the plastic parts on the tube and the rollers on the suction bar are a little shaky, but even that is not the issue.