I have terrible luck with vacuum cleaners including a Dyson. In the last 5 years I've bought 3 - all name brand, all fairly spendy and all broken! The plastic parts break, the motors wear, the roller mechanisms grind them selves to powder. aarg.
I don't really have unusual use (i don't think) I have about 1800 sq ft of med
Same here. Went through 3 vacuum cleaners (all uprights) in 4 years. Two Hoovers and one Eureka. All expensive pieces of junk. One caught on fire. Another one kept overheating and shutting down for no apparent reason (the tech people never found what was wrong with it). On the last one the belt broke and the new belts that were installed kept burning leaving a disgusting burnt rubber smell everywhere in the house.
We then bought an Electrolux Harmony canister vacuum and it has never failed us in the past 5 years. The motor has never overheated. Parts are a bit expensive, but I think it's well worth it. My mom has had the same canister vacuum cleaner for 21 years and she uses it everyday! There is no excuse for an expensive vacuum to break down after just one year of use.