I bought I Dyson (DC01 I think) maybe 8 years ago when they first came out, it was great and only broke recently when I dropped it down the stairs.
As a replacement I bought a 'Henry' instead of a new Dyson, mainly as they were cheaper and supposedly better.
However for us the Henry is a total pain in the ar$e to use. My GF can't carry it as she doesn't have the ull use of one hand, and can't carry the whole unit/pipes in the other hand at once. It doesn't do as good a job on carpets as the Dyson did, presumably as it just sucks and doesn't brush the carpet with a rotating brush. It takes a lot of effort to use on deep pile carpet, such that my GF can't really use it. The suction is so strong that you have to be careful not to pull up lino/carpets in the corners of rooms.
Having said that, it's great for doing the car. So I'm planning to get another Dyson (maybe a DC07) for use in the house and keep the Henry for the garage/car.