Nope, it works with Diet Coke too and is delicious!
What I did with mine, it fry chicken breast chunks, with a little frylight until almost cooked, add a sprinkle of ground ginger and then add a can of diet coke and cook on a high heat until reduced and thick. I then added stir fry veg and it was yummy!!
Can definitely recommend it...even if you are skeptical (as I was), I can recommend you give it a try...you wont be disappointed!