I have had the DC33 for about 6 months now and no complaints yet. It is an upright cleaner so I was a bit scepticle about it as I have a large house with stairs. It has a telescopic wand that does the stairs and can get under low bearing furniture like beds and coffee tables etc.
Some people say this one is noisy but I find it no noisier than any other vacuum cleaner I have used, including Electrolux, Vax and Miele.
The suction is fantastic but I have heard of mixed issues regarding Dysons. Some people loved them and others had problems with their models.
If I were to be picky and have to find something wrong with it, I would say that the cord can sometimes get in the way when using it. However, this is common for most upright vacuums.
I took the plunge and bought one and would recommend it to anyone else based on the experience I have had with it. A great machine imo.