In your experience, how much wood do the modern units use? How would they compare to an older style, forced air wood stove? I just bought a Pioneer Dutchess, same fire system as the updated Pioneer Princess. It's billed as "airtight with downdraft efficiency technology". It's a 630 pound stove, seems to burn clean. It's our only cooking/heating option in West Michigan. I'm keeping tabs on usage and we'll have a good idea by May, but I'm hoping to see others' experience.