the same happened to me when i switched from normal pepsi to diet (well, pepsi max, but no one outside the UK knows what that is). and I was/am drinking about 2 litres a day.
I second that, they are good. I always get the steak and add mushrooms to it also. But yea been awhile since had myself. I used to go there every morn for coffee and breakfast, meet with my work crew, but we all stop going, too expensive.