My wood is usually medium soft. I have a lot of fir, some alder and maple, some fug wood. I only open up my draft when I start the fire, otherwise it is kept fully closed.
Oh and I should point out, buntime on the non-cat was just that I could relight without matches. It wasn't a big bed of left over coals! The Stove is rated for 9 hours and that's what I could get with softwoods. It sure was a pretty one.