Ive had the jetboil system for about 5 years now. I love it. I have the accessory that turns it into a typical stovetop burner. Works great! I can cook anything I like with it. It is only good for cooking for 1 or 2 people though. I also have the coffee press for it and it makes awesome fresh coffee.
I wouldn't recommend cooking anything in the cup it comes with other than boiling water but with the stovetop attachment you can use typical camping pots and pans to cook.