Just got one this afternoon. The manufacturer specs are somewhat...
I've used my kitchen scale which is supposedly much more accurate
As a reference: Primus Power Gas canister (100% new and full): 201 g.
Pump: 103 g.
Fuel bottle (0.35 l) empty + plastic cap : 109 g.
Fuel bottle (0.35 l) full (up to Primus' max filling black bar indication) + plastic cap: 320 g
Stove: 219 g
Pouch: 144 g
Windshield: 96 g
I'm assuming the 0.35 l will be enough for 1-2 people for 2 days.
More tests and a full review to follow shortly