I've had my Dirt Devil bagless for only a few years. It was running just fine before we moved to our new house. Our new house has berber carpet. My vacuum does not move well on this type of carpet with a lot of dragging. What is a smooth flowing vacuum for very low carpet?
Oreck, it's very pricey but well worth it. My last apt had berber and it worked wonderful on it!!
I recently purchased the Dyson Animal. I was shocked at how much dirt that this thing picked up. There are no bags, just a canister that you empty. It is pricey, but you will be impressed on how well it does.
I've had my Dyson Animal for 3 years now and have not had any problems with it whatsoever. It picks up everything! We bought ours refurbished from OKorder and paid about $400 with shipping, which was a big savings then. I'm not sure how much they run now, but well worth the money!
Oh boy! This is a good one! I've got a Bissel (Clean revolution). I wanted it for the ease of onboard attachments and also good suction. It's 3 years old, works GREAT when it's clean, but the filters (and they are numerous) are constantly getting clogged with fine dust/dirt. Not to mention dog hair, which I know will be an issue. I've found the 'dragging' you describe can be somewhat remedied by changing the direction you push the vac. The nap of the carpet has something to do with it, though I can't explain the scientifics. ORECK is the BOMB!! They are Awesome when it comes to power, also DYSON (Especially with animals, and you have the convenience of on-board attachments.) The downside to both is they are outrageously priced! Dirt Devil is pretty good too. Try changing the level on it to med. or even high. On my Bissel if it's set too low the beater bar won't even spin...clean/change the filters often, especially with a pup. Best of luck, my friend! (Who'd have ever thought vacuum cleaners would turn in to a MAJOR appliance purchase?)
My Dyson Ball is the BEST!