Interesting but why if it's a 2 person set does it only carry a 100g gas cart when the ETA Express which is designed for solo use can carry a 250g cartridge?
I am writing this on behalf of Primus. I work for the company which is their distributor in the UK.
Primus designed the Eta PackLite to have a small pack size. This was one of their objectives. The stove is a remote canister design, so has a flexible gas hose that needs to be wrapped around the burner when stowing away. This makes it a bulkier unit than the EtaExpress burner, which is a sit-on top stove design.
So, as an important part of maintaining a small pack size is to stow the burner unit inside the cooking pot, Primus decided it would be better to make the pot big enough to cook a meal for 1 or 2 people but small enough to make a significant saving on space compared to their EtaPower stove. To achieve this meant there would be enough space for a 100g cartridge, but not enough for a 230g cartridge. (The pot also contains a roll-up windshield and pot protection liner which actually doubles up as a food-grade bowl, so Primus have managed to pack a lot of features into this new model). The Eta burner's efficiency is good enough that even a cartridge as small as the 100g size will provide sufficient fuel for two people cooking 3 meals a day for just over 2 day.
I hope this goes some way to address your queries. If not I'm sure I'll read your forum posts which will say otherwise!
well given the pack size and the completeness of the kit including windshield etc I can see why it only holds a 100g cart.
I've been tempted by an ETA Express (currently have a Jetboil that I'm not keen on) but the ETA Pack-Lite is going to be worth looking at. If I'm honest I don't like 100g carts as the performance drops off really quickly (one of the reasons I don't particularly like the Jetboil) but I suppose I could carry a 250g cart separately.