I have used a DC33 for many years, 10? and I sort of beat the the heck out of it. (lots of home improvement projects here, DH tends to forget it is NOT a shop vac).
One tip, there are youTube videos on how to take it apart, and I found this helpful when it got a bit clogged up. Again, not from normal use! From fine sheetrock dust, and now I am stripping and sanding my stairs, making a big mess, and using the Dyson to clean up...... I did not need to do this for years and years, just lately because of the abuse. (I figure at this point, we will keep beating the crap out of it, and replace it when we move in 1-2 years).