I've been using the Jetboil system for about 5 years. I love it.

I started with the Jetboil Personal Cooking System (PCS). That's the one with the tall, 1L cup. I often eat at local establishments on a tour and supplement that with my own cooking when convenience or taste dictates. Most of the meals I cook for myself consist of boiling 2 cups of water and adding freeze-dried contents, pasta, or instant rice meals.

I found eating directly out of the tall Jetboil cup to be less than a satisfying experience. I prefer a bowl or something where I don't have to "go fishing" with a shortish spork to get to the bottom of the meal. Eventually, I bought the 1.5L Jetboil pot and the little adapter kit for it to sit comfortably on the burner. In the end, I ended up with what is sold as the Group Cooking System (GCS), even though I use it only for myself. I don't take the tall cup with me. I pack the burner and the cartridge, along with my eating utensils and a small biodegradable soap bottle in the 1.5L pot for traveling. The GCS only weighs 5 oz. more than the PCS.

Now, I feel like I have the perfect setup for the way I travel and the types of cooking I do. There's plenty of room in the pot for my added dry food after the water is boiling. The stove can be turned down to a simmer to finish the cooking as desired. The pot is easy to eat from, like a large bowl. Cleanup is easy and the whole thing packs up efficiently.

All of my trips so far have been of the 2-week or less variety, so I've never had to search for canisters on the road. I take a Colemen 8 oz. isobutane canister in place of the smaller Jetboil one if I think I'll be cooking quite a bit. Turn it on and push the igniter. Nothing could be simpler.