Ahem, I am doing the Dyson/Mumsnet trial and I have been testing the DC19 T2 - is that the one you mean?
If so I can really recommend it for pet hair. It comes with a brilliant little head like this which is amazing for getting hair off upholstery. DH deals antiques and is v impressed with the way this one cleans his chairs.
Only thing I'd say is that if you're used to an upright it might take a bit of getting used to - I'm used to a Henry with really really long cables and hoses and the hose on this is a bit short.
We have one of these (it was exdisplay and very very cheap when my DH worked for a well known DIY chain) unfortunately we don't have the attachments because of the ex display and we have a very low shedding dog! However the suction is fabulous! Never had a vacumn like it.
We have one - it is several years old and still works really well. We have 2 dogs and 2 house cats and it is fabulous for pet hair.
It has been repaired (can't remember what was wrong I think a hose may have split) - it was still under guarantee, Dyson came to the house. The Dyson Man arrived at 7.30am the day after I had phoned them.