I used a Stratus wood stove 2005-2006 and was fairly disappointed. Although the stove did great in my backyard (5400 ft), its performance really fell off at altitude. At 10,000 ft it was a chore to get it to do anything, and above 11,000 ft it was nearly useless. Low oxygen was a problem, obviously, and was compounded by the resinous fuels available, principally Englemann Spruce and Subalpine Fir. These would burn well enough to get started, and then die out immediately when I put a pot on. I tried drilling more holes in it, which helped, but it never really was satisfactory.
I still like the wood stove concept, and both the BushBuddy and Ti-Tri have gotten good reviews on this site. But backpacking in CO often means camping at timberline (~11,500 ft), and I haven't seen a review stating that either of these stoves works great at this altitude with the fuels available there. The Trail Designs web site shows the Ti-Tri being tested at 10K, but that's not enough to get me to switch from my Trangia.
Does anyone have any timberline experiences with these (or any other) wood stoves?