I have the Double Oven, purchased from WiseMenTrading http://www.wisementr...tdoorbaking.htm Here are some thoughts:
The oven is unique in the way it opens. There is a wire cage attached to a lid on the top so opening the oven means grabbing the handle on top and lifting the entire cage. If you look at the left hand photo on the WiseMenTrading site you can kind of see what I mean. The "double" part means that there is a rack in the middle of the cage. This gives the oven two cooking racks so that two pans fit in at the same time.
Opening the lid from the top causes some heat to escape (though not too bad though if the oven has been properly pre-heated) but I'm guessing more heat escapes from the Double Oven than from the Coleman's front entry door. However, I guessing the Double Oven people designed their oven the way they did so that a person wouldn't have to get their hands close to hot coals. It seems to me that the Double Oven was designed more with campfire cooking in mind and the Coleman for over a gas grill. I think.
So thus far the Double Oven has worked very well on top of the wood stove. We run our wood stove with a stove top temp of 500 - 600 degrees which equals an oven temp of 350 - 375. Although I once managed to get the oven temp to almost 400 degrees. I've baked pumpkin bread, cooked macaroni and cheese, heated leftovers, made apple crumble, etc. and had really good results.
One difference with a stove top oven though is that the heat comes only from the bottom, unlike an electric stove which has a heating element on the top and bottom. So when I cooked granola it took extra long to get the granola crisp. Still do-able - just takes longer.
Alright, the one thing I don't like about my Double Oven is it only fits pans 8" or smaller. My bread pans don't fit and the stainless steel square pans I bought to replace the non-stick pans included with the Double Oven turned out to have such a big lip that they don't fit. So the Oven is much like a wood stove toaster oven. Which is fine but ...
... it prompted me to make a wildly expensive purchase. I finally broke down and purchased the big oven from Lehman's http://www.lehmans.c...;iProductID=110 and then told my DH he had just bought my anniversary, Valentines, birthday present. Insert DH rolling eyes here Once it comes I'll have to give it a try. I still think I'll be using my Double Oven a fair amount, even after the Lehman's oven shows. The Lehman's oven weighs 24 pounds!!!! I'm sure I'll still prefer my lightweight Double Oven for leftovers or small dishes.