Shark US stratos upright vacuum is so nice!! You will need to assemble a few pieces but they pop on easily and it's easy to do. It's an allergen sealed system which is great!! Especially if you have allergies. It comes with odor neutralizer technology. It's a little disc you put in and has a very light scent that just smells clean!! Working the vacuum is easy and it's easy to push and use. It has awesome suction power. The canister can come off so it makes vacuuming stairs super easy. Love this vacuum so much and will continue to use for a long time!