You're right Sugar Twin is a sugar replacement which can be used in cooking. According to the box it's made by Alberto Culver USA, Inc. and the ingredient list is: Malodextrin, sodim saccharin, calcium chloride, caramel color and artifical flavor.

Re using different types of sweetner - the idea is that by using a variety of different types in a recipe you can actually use less sweetner overall, thereby decreasing the likelyhood of a "sweetner" taste. To be honest, this is all theory to me because after testing a number of different recipes (and throwing them out) I realise I can always taste the sweetner in cooked goods, so I've given up trying to use them.

Jay