I spend most of my time in the Ecuadorian Andes (cooking at 10,000-15,000 feet) and this is my "go to" stove. I've also used it on weeklong trips in Peru's Cordillera Blanca with similar high altitudes. Pros: fast setup, fast cool, the boil champ! Cons: the boil champ simmers poorly and won't accept other pots or pans. If you want something hot in a hurry at high altitude, look no further. While I still use my MSR Whisperlite International at lower altitudes or if I have lots of time to cook, I prefer to sleep than tinker with it at high altitude.