Shark Rotator Pet Upright Vacuum, Black

We have two large mixed breed dogs. One has a coat like a pointer, the other has the coat of a german shepherd. I vacuum multiple times per week and we have hard surface floors only, no carpet. After every couple of uses, I have to take the roller out and clean a thick, dense mat of hair that's collected around the roller brush, which is advertised as being "self-cleaning." After troubleshooting by phone with a Shark representative, he declared the vac to be "working as designed" and suggested that I purchase more pet accessories. Since I already purchased an expensive vacuum that's specifically marketed to pet owners, the suggestion of spending MORE money to get results that should be typical is ridiculous. As an aside, if you're considering this model, please note that the hose length is very short. You should anticipate that if you need to use the hose for anything above floor level, you'll need to detach the (portable) canister. Although it's easy to connect and disconnect the canister, if you're using one hand to hold the canister and another to operate the hose and suction tool, you're a bit out of luck if you need to move things around in order to complete your vacuuming. I hope this review is helpful to others. I regret buying this model and am planning to return it and buy something other than a Shark. Very disappointed in its performance and in Shark's customer service on this matter.