I have two Dysons, not uprights, DC 21 Motorhead, and DC 22 Baby.
I had a Dyson upright in Japan. It weighed a ton and was really noisy but was very effective.
Yes, they are noisy, but they are great machines, complete with a 5 year warranty.
Before the Dysons, I bought a Miele Cat and Dog and an AEG Vampyr Oko. ( I still have both as I haven't been able to sell them
). Both are supposed to be great machines if you have pets....they are decent but don't compare to the Dyson. They are much quieter though.