John W.wrote a review of Jetboil Helios Guide Cooking System on October 29, 2011
We used this stove on a Denali trip last May/June. Worked extremely well for our three person team. Very efficient at melting snow. The lighter was inconsistent at 17,000 feet and once the fuel nozzle had to cleaned out with an MSR stove cleaning wire. Otherwise, we had 14 days of brilliant snow melting. With the fuel inverted, we never had an issue with the fuel not working, even on chilly nights. On the evening before summit day, we had a bit of ice on the fuel bottle ... looked like good karma for summitting.