One of DHs coworkers sent me some samples of a product called Whey Low, which is yet another sugar substitute. She also sent me some cookies made with the stuff, and I'll have to say that it didn't have that nasty chemical taste that you sometimes get from foods with faux sugars.
So, it looks like sugar, tastes sweet, and measures like sugar. She sent me an email about glycemic indexes, but since I don't have sugar issues, I have no idea what to compare this to, or whether I want to care.
Maybe someone who knows more about such things would want to weigh in on the relative health value of this stuff compared to the alternatives. I don't know if I'd buy it for myself, but I'm always curious about different food choices.