[M_Six]

I have two Sharks, one upstairs and one downstairs. One is 40-minute runtime and one is 50. Neither last that long if you use the high suction mode, obviously. Both are pretty decent for our house, which is all hard floor. We use them to keep on top of the cat hair and bits from the scratching posts and pads. For that, they work well. Just a quick cleanup every now and then. They're also way easier to use on the stairs than our corded canister vac.