From the REI website:
This stove brings ease of use and an adjustable flame to backcountry and high-altitude cooking; great for the outdoor chef!
Runs on Primus LP butane/propane cartridges which burn clean, won't spill and have a low freezing point—good for high-altitude cooking
Sturdy, lightweight, simple construction will appeal to the weight-conscious adventurer
Flame is adjustable for simmering, boiling or anything in between—just like your stove at home
Stove assembly attaches quickly and easily to the fuel cartridge, sold separately
Stove accepts any canister with female Lindel valve, including MSR, Primus, Snow Peak and Brunton canisters in various sizes and fuel formulas
Fuel canisters sold separately
PerformanceResults from REI testing:
Suggested use: Backpacking
Weight (w/ no fuel): 9.3 ounces
Dimensions: 5 x 5 x 2.25 inches
Fuel: 70% butane/20%propane/10% isobutane
Average boil time: 3 min. 28 sec.
Burn time (max flame): 50 min. 42 sec.
Water boiled per 100g fuel: 6.8 liters
Ease of operation: Excellent
Cold weather use: Fair
Stove stability: Excellent
Pot stability: Excellent
Ability to simmer: Excellent