The Boost shakes (for Glucose control) aren't bad, and they're lower in calorie because they don't have all the sugar.
Also, for the protein powder shakes, I ordered a ton of different extracts and mix those into my shakes with a little extra Splenda. You'd be amazed what a little coconut extract will do to a nasty chocolate shake. Peanut butter and cheesecake flavors are also tasty.