Deliberately did the hall carpet with the Dyson then, soon as the Shark was up, did it again. Impressive. It actually sucked.Thanks for the info. We have kids and a cream carpet (house rented) so you've got to be Johnny-on-the-spot with the vacuum before dirt gets ground in. The battery has pretty much gone on the Dyson cordless and our main vac is a big Dyson which is sodding awkward to do the stairs with.