I have 2 Dysons. When we had the big hairy German Shepherd I got the first one - the big purple one. Love it. Worked great and sucked up tons of hair. Fast forward to doggie went to heaven and I got the Digital Slim. Love it too. Cordless. Hardwood, carpet and furniture. I can do the entire house and it doesn't need to be recharged. I've never had a Shark so can't compare.