Thanks guys, for the information on Henry.
As for a smelly vac bag, I learned quite a while ago to carefully store the bag, inside another bag (or sealed container) and in the freezer, whenever the vacuum isn't in use.
Why? Because the freezing kills most all dust mites and bacteria that typically have a big party in the dust bags, when the vac isn't in use.
Also, there is a nice neutral fresh smell when you vacuum.
The ease of removing, and the size of the bag, is thus, an issue. This is one reason I like my 80s Electroluxs. Just open the door and slide out the bag. Not as easy on Kenmore, Eureka, and Hoover canisters. I'm not sure Henry would be as simple, either.