The GeoShield is very stable and cooks reliably, and bystanders were enamored with its unique design and setup. However, after several days, the assembly process grows tedious, and the windscreen tab connections bent out of shape. The base plate attachment points often needed to be adjusted back into position. 

Fuel Efficiency
The GeoShield is very efficient. It boiled 16 liters of tap water averaging 62° on an 8 oz. canister of fuel for an efficiency quotient of 2. Expect a little variation either way based on wind, water temp, and elevation. 

Boil Time
The GeoShield averaged 5:29 per boil for a liter of cold tap water over the span of 16 liters boiled. The wind was a factor at around 11 mph.

Weight
The GeoShield weighs 13.6 oz. without its two stuff sacks and the included piezo igniter, which weighs .5 oz. 

Wind Performance
The Snow Peak GeoShield does okay in the wind, averaging the same time per boil as it does in calmer conditions. It holds steady during occasional gusts because in “wind protection mode,” the burner is positioned below the top edge of the shield. Fuel efficiency starts to decline in winds over 11 mph. 

Cooking
The GeoShield is an excellent cooker, holding a simmer for extended periods and avoiding hot spots on pots and pans. Pot quality and material are often the scapegoats for scorched debris and stuck-on Ramen. The real culprit is usually an inefficient burner. These tests were conducted with the Sea to Summit X-Pot and a 1.5-liter hard-anodized aluminum pot from MSR.