Last year was my first year with the Oslo. Spent a lot of time figuring things out in order to get the most efficient burn. By this time last year, I had already burned through a half cord more wood than I have this year. I believe part of it was getting started on my woodpile a few months earlier, so I'm burning wood that's been dried for a year now. Learning how to get the stove really burning well seems to save a couple armloads of wood a day as well. Anybody else found their wood consumption drop dramatically after a year running a new piece of big iron?