The Primus Eta Spider has some minor flaws amidst its very impressive all-around feature set. While useful, the windscreen could be easily replaced in the field with the simple lightweight aluminum screens sold with many other major stove brands. The zippered pouch, which can also insulate your meal after cooking, adds a good deal of packed bulk. Still, the Eta Spider’s flame can stay consistent just above burner height for extended simmering or roar to life when you need hot drinks quickly. The stove is very tough and the raised, rubberized lid-grab remains the most practical across all stove brands.

Fuel Efficiency

A 100 gram canister of Primus Power Gas powered the Eta Spider long enough to boil 20 two-cup pots.

Boil Time

The Eta Spider averaged 2:53 to boil two cups of tap water in calm, warm conditions. The last four boils slowed considerably as gas drained, affecting the average over the lifespan of the canister. For the first 10-15 pots, expect to boil two cups in just over two minutes.

Weight

The Primus Eta Spider weighs 2 lbs. 1 oz. when packed in its carry bag. This includes the handheld Piezo igniter and the BPA-free plastic bowl that come with the system.

Wind Performance

The Primus Eta Spider performs admirably in moderate breezes, averaging 3:38 over five boils of tap water when subjected to consistent, moderate wind.

Cooking

The Primus Eta Spider is an excellent stove for cooking. Its simmer control allowed me to keep pasta bubbling right at the rim of the pot for well over 10 minutes. Its broad stance enables the use of larger pots and pans, too. This stove is meant to do more than pour boiling water into a bag.