I have a Primus butane/propane stove and it works very well at temperatures above freezing and non-windy environments. It would probably benefit from the use of a simple heat exchanger, maybe homemade. The stove itself is very light and small. The canisters take up the majority of the space and you have to be careful about tipping the whole thing over.
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Here's what other sites are saying:
A powerful stove with an extremely high output. Perfect for large groups or for cooking large amounts of food.