Powerful suction. Easy to clean and maintain. BUT, on deep-pile carpet the unit is very difficult to push. I called Shark product support and, after a long discussion, was told that this is "normal" for this machine and that on thick carpet it is going to be difficult to push. A machine designed to vacuum carpets should be designed to handle all carpets, even ones with a 1/2"-deep pile, like ours. Buyers should be advised of this in the promotional information. Disappointed!