I'm a guy and the one that usually vacuums.
I HATE the bagless units. We had one. With a dog + cat, every time we were done vacuuming I had to take it outside and dump. And deal with a cloud of dust. Then it would smell so I'd have to wash out the cups and junk.
With the bagged one, we use it, it will smell, change the bag without the dust cloud, and when the new one is in, it's smell free again. No mess, no fuss.
Bags are pretty cheap and are HEPA so its also easy on the allergies. It's a Kenmore (Panasonic) canister and does an awesome job in the cars as well.
I'd never, ever go back to bagless.