I have experienced some pretty cold temps so far this season, lows near 12deg at night and days were it remained below freezing, so far I have to say that I'm really happy with the stoves performance, I am burning it a little different this year as opposed to past seasons.
The one test I did was to burn only large splits, a mix of oak and ash, all split sizes +6" these were split and stacked 3 years ago, and 2 years ago they were moved to my open sided wood shed were they sat.
The big difference I see is extended stove top temp about 400 deg, the stove top will hit 600 or so, but as the burn settles in and the cat needle starts slipping past the high noon spot and more like 10am spot the stove top remains at 400f.
This has allowed for a very warm house, to the point that I have actually had to turn the stove's t-stat air controller further back that previous settings, and I'm now a solid 16hr burn time with the blower running on medium / low. I have approx. another 2 cords of these big splits and then 2 cords of my traditional size 3-5" splits. I also see better performance (although loading is more difficult) when I load E-W vs N-S, N-S is much easier and you do get better flames with cleaner glass, but I see the better long steady stable burns loading the other way.
Or maybe I'm just bored with this stove and I'm manufacturing my own entertainment with it lol.