We purchased the DC50 after years of satisfied ownership of a DC17 (which is now the "upstairs vacuum"). The self-adjusting cleaning head on the DC50 is wonderful. It did a noticeably better job cleaning cat fur off of the family room carpet compared to the old Dyson. The only major complaint is the same one I have seen in many other reviews here — the waste bin is too small. Also, while I understand that the goal of the DC50 was to create a much smaller, lightweight upright, it feels a little too lightweight and a little too cheap. That said, it cleans very well and we are very happy with it.