In reply to Susan:
I bought a Nova six months ago for a sea kayaking trip. The friends we went with used a Dragonfly, so got a fairly good comparison of the two side by side. The NOva IS a very nice stove, but unsuprisingly has pros and cons compared with the Dragonfly IMHO:
Pros :
1. Runs happily of kerosene (very cheap) - ran it for two weeks + when I came to clean it after the trip the jet + integrated cleaning needle were spotless. The D'fly was definitely prone to blockage, even when run on Coleman fuel.
2. More compact design than the D'fly.
3. A bit cheaper + get a fuel bottle with it.
4. Quiet. Though I dont think the Dragonfly is excessive, personally.
5. Metal pump feels more robust than the MSR one : My mate reckoned he'd seen quite a few problems with the MSR plastic pumps (breakage) on a kayaking trip in Canada a couple of years ago. I dont know if the design has changed since then tho'.
Cons :
1. Regardless of what fuel is used, it is def less powerful than the D'fly: Boil times are quite a bit slower.
2. Doesn't come with a windshield (However, Optimus specifically state that one should NOT be used).
NOt sure I would bother with a multifuel stove on a climbing trip - Far too much hassle c.f. a gas stove (assuming cartridges are available), unless of course altitiude is going to scupper your chances of using a gas stove...
I'm sure there are more, but I cant think of any. Hope this helps....