The vacuum cleaner is, the positives first, handy and lightweight, which means you can wear it without problems from one location to another.
The vacuum cleaner I have, according to the manufacturer's instructions, which is illustrated in great detail and added in German, assembled, adjusted ie telescopic tube attached to the suction hose and to the correct height (for my size) to in an upright position, much like described in Figure 15 of the operating instructions, to begin cleaning my carpet. And, to my surprise, I discovered frustrated that I, the already decades working with vacuum cleaners, the so-called "Dirt Devil" could not move from the spot. As also helped my attempts to adjust the carpet brush by foot control to make fog air regulator on while cursing vigorously - nothing. The carpet brush stuck to the carpet and had no intention to move back and forth, as is usual with these devices. I brought only a kind of "sweeping motion" into existence until the telescopic tube, which can not be locked to the suction hose, my efforts put an abrupt end in which it dissolved. After several attempts, with the same old result, I gave up. So I can not suck carpets with this device!
Later, my husband tried his luck and got, though moved with some effort, the carpet nozzle. For carpets of this vacuum cleaner, my personal opinion and my experience is to not suitable.
It sucks but upholstered furniture or car seats without the use of telescopic pipe and carpet nozzle, so this works well. Suction power, the "Dirt Devil", but unfortunately it can not regulate this. A real drawback, I think.
On the other hand to use the floor nozzle similar to a smooth surface like parquet, stone tiles, clean, there are no problems. Since the device displays that can afford something.
To refrain from vacuum cleaner bags, of course, saves money. But in my opinion, you should, at least at the beginning, if you want to empty and clean the dust bin of "Dirt Devil DD5550-3", have the manual at hand. Together with my husband, more familiar as an engineer with the technical details, I managed to empty the dust container without damaging the device right out of the. Unfortunately I am often a little impatient. And patience is needed initially in this vacuum cleaner.
Conclusion: A vacuum cleaner with a very good performance, but, in my opinion, only for hard floors (and pad if you use only the suction hose here) suitable. A big drawback is, I believe, that you can not regulate the suction force. This deficiency also make good characteristics such as the energy efficiency classification "B", not betting.
