Wire-free independence. There are three power settings, however the weakest suction setting is where we seldom use it. With the Hong Konganent mode set to its average speed, a 70 sq. m. apartment can be cleaned two or three times before needing a recharge. Maximum power does not significantly enhance the suction coefficient, but the noise level does, therefore I rarely use it. You'll quickly grow used to shaking the trash into the bag, which makes cleanup a breeze. Hair, wound on rollers, brings small problems but may be quickly dismantled and washed. Since hair will wind itself on any machinery, this can't be counted as a drawback. I urge you to buy.