It wasn't too much of a problem although I did have more gas...but I think if I drank a lot of it (more than 1/2 cup) and consumed other carrageenan-containing products I would go back to having really bad cramps. I swear, cutting out carrageenan really made a big difference when I first started the diet.
Most flavors of Vitasoy are carrageenan-free and they taste delicious! When you're ready to try a soy milk, I'd recommend Vitasoy Creamy Original Soymilk. Watch out for Vitasoy Complete, which I bought because it had added vitamins and minerals, but it also contains extra fiber (acacia gum) AND carrageenan. Whoa!
Soy Dream Original and Vanilla flavor are carrageenan free as well, although they have a bit of an after taste.
As for rice milks, I really like Rice Dream Original with cereal or as a milk sub in soups, mashed potatoes, etc. I haven't tried the chocolate flavor yet...I wonder if it would taste good. I guess anything chocolate is worth a try! Thanks for the suggestion!