Stoves that sit directly on top of the fuel canister tend to be lighter than their remote fuel cousins but they definitely have their drawbacks. Primarily stability & poor performance in windy conditions. Stacking pans on top of a stove on top of small fuel canister can definitely need to quite precarious pasta and the height above the ground means its quite hard to shield the flame and pan from the elements.
That's why remote fuel stoves really are the best way to go: All the convenience of gas canister fuel plus the added benefit of a large, low to the ground foot print.
Optimus' offering, the Vega, consistently wins awards and is noted for its high efficiency, quick boil times and sturdy construction. The Vega also comes with a gas canister stand which allows you to invert the canister to allow for the efficient use of the very last dregs of fuel. It ships with a useful fuel windshield that also adds massively to the efficiency of the system. And once you've finished dinner, it folds away and can be nested inside pots for transport.
Fuel: Butan/Propan Gas
Burning time: Up to 160 minutes at max. output (220 g gas cartridge)
Cooking time: Approx. 4.5 minutes for 1 liter of water
Output: 1.400 Watt/4.760 BTU in efficiency mode 3.700 Watt/12.580 BTU in 4 season mode
Weight: 178 g
Dimensions: 130 x 70 x 65 mm (folded)
Guarantee: 2 years Material: Stainless steel, aluminum
Accessories: Stove bag, windfoil