I purchased the Bissell SureSense Pet upright to replace a Shark. I like how easy this is to maneuver, but I’m really happy about how it picks up right to edges and corners, something my Shark didn’t do. The attachments stay attached until you’re ready to use them. It’s heavier than the Shark, but that seems to help in how easily it moves with little effort. I have three cats and between their fur and tracking kitty litter, I vacuum often and really Ike this machine.