They really are.
We have had ours since 2002.
Luckily we bought an extra waranty to cover any problems we had with it.
It has now run out and every year in that Waranty we have had to have something replaced on it.
Now our fan belt has gone on it so I can't hoover up using the blasted thing upright, I have to bend my back and use the sodding attachments.
And not only that, the suction has gone on it.
Again.
So unless you want to prove me wrong Mr Dyson then I swear that I will never in my life own another.
Oh and my mum has had the exact same problems with hers too.