Summary: I had a dyson DC14 for 8 years before having to replace it. I borrowed a shark vacuum while waiting for my new dyson DC33 and was so happy I could stop using the poor performing shark. The dyson is lighter than my old one, has new features that I appreciate. I like that the attachments all hook to the machine with a simple "click" you know you're not going to knock it off and lose it. The only thing that makes me worried is the wand doesn't feel as tough as the old one.
Summary: In comparison to my current 2 Shark brand vacuums the suction was very poor. It is also large and more difficult to maneuver than my current Sharks. I bought it on a whim, very disappointed, ended up returning it.
Summary: This is the absolute worst vacuum I've ever owned, and my last vacuum was a cheap dirt devil. The assembly directions were impossible to decipher, using as few words as humanly possible. Once I finally got it together and used it, it wouldn't even suck up fuzz or string on my low pile carpet. The hose is awkward to use and doesn't reach more than 2 or 3 feet in front of the vacuum. It made my carpet pill really bad, and now my carpet looks terrible.
Summary: I purchased this vacuum to replace my dyson dc14 animal. I LOVE my original dyson and it still works; but over the years, various parts have cracked or worn and I figured it was time to update. The dc40 has no where near the suction of my dc14, and is several inches shorter so I felt like I was stooping to vacuum. I also did not like the plastic hose...my dc14 has metal hosing. Overall, the dc40 just did not compare to my ten year old dc14.
Summary: I've had a Kirby vacuum for over 17 years and I just purchased this Dyson vacuum. I honestly didn't think it would work as well, but I was surprised, the suction was very good. I was amazed at the dust that was in the canister after I vacuumed. I have one child with asthma and the filters on the vacuum are excellent. The only thing I'm adjusting to is the fact that everything is right on the vacuum.