I was just surprised by the mess it left...Not angry, but don't bash the ash.
Way better than pine. Not even close.
No, it doesn't have the BTU'S or burn time of a "premium" hardwood like oak; but it is a good burner and readily available. Seasons quickly, starts easily, burns decently even if not well seasoned (20-25% - try that with oak), coals pretty well. I'll take it over birch any and every day and probably over cherry or elm, although I do like cherry and elm. I have to burn down the coals after 10 hours on a full load of ash in my NC30 (tube stove, not a cat) to make room for the next load. Yes, it leaves a lot of ash...and clinkers.
If I had access to more of the premiums I'd still burn a lot of ash. I save the little bit of oak, locust, beech, hard maple, hickory, etc for the really cold weather.
I know it seasons fast. This was 2 year. I'm burning 1 y/o pine right now, measured at 15% or so. The stove has been chewing on it for 12 hours, and I'll have quite a bit of hours left. So no bashing pine either (It's warm outside though today, so I dialed the stove way down.)
It's what you get, scrounging. This year I have about 1.25 facecord of ash, the same in pine. Half a face cord of sassafras is already gone. And 5.25 face cord of oak.
Next year it'll be cherry, ash, oak, and some maple. And pine if needed. The year after only oak and some locust (and pine if needed). So I'll see how cherry does then.