I used to gag at the shakes alone. (CD USA is not any more appetizing.) What I have found that works and makes them taste decent is to make slushies.
Blend the shake in a blender with plenty of ice (usually at least a cup full, maybe 2) and water to taste. Add some "sugar free sugar" (my new little joke) to taste. I bought the french vanilla thinking they'd taste lovely - Wrong!!However, when I blend a pack of it in the blender with the ice, the sugar free sugar, and extract to taste it is edible and -almost- tasty. Orange extract with a little bit of almond and hint of vanilla, I find, tastes about like an orange dreamsicle. I'm guessing I will be sick of them by the end of all this, but at least I can get them into my system. If you like slushies, it's worth a shot.