It sucks like crazy!!! The thing cleans extremely well. No belts and bags to replace, it doesn't lose suction, it's strong and sturdy, if something like a sock gets sucked up, it's easy to find it, and it has a 5 year warranty.
The main thing is how it cleans. Normal vacuums cleans the carpet. The DYSON cleans UNDERNEATH the carpet. That's how well it cleans.
When I used to use other vacuums, I used to go over everything more times because I knew it wasn't clean enough. When you use a DYSON, you just KNOW it's clean.
And it has a rinsable filter, and a easy way to toss the dirt...you hold the dust collector part over the garbage and push the red button, everything falls into the trash. That easy. No dirty work.