I don't like the idea of having to buy a bunch of refills for a diaper pail. So I was looking at either the Ubbi Diaper Pail

Or a Simple Human Retro Round Steel Trash Can
The Ubbi has some great reviews but a lot of people complained about the opening being to small for a really full diaper and that the plastic pieces inside can rip the bags open. The simple human is about $20 more and doesn't have the gasket that the Ubbi does (which I presume helps to eliminate the smell).
Has anyone had experience with either of these? Are they both just going to stink unless I get a diaper pail with refills?
eta: for clarity
Re: Diaper pail or Steel trash can?
is Simple Human 40L, lid locks, has the foot push pedal for when unlocked and takes the same kitchen trash bags as the other cans. We change the bag about once per week and does a decent job containing 95% of the smell. No pets here however my friend who reccomended it has 2 dogs.