I think the Atkins shake, at least the vanilla, is guh-ross. It tastes like a piece of chalk ground up and mixed with seltzer, plus some weird vanilla flavor. The Keto shakes are a million zillion times better. I hope you haven't already made the mistake of buying the Atkins one, but if you have, and you think it's as nasty as I do, just get a can of Keto and mix them half and half to use it up. The Keto is so much better that it can almost fix the vile Atkins taste. (It's best on its own, though!)

Keto shakes come in lots of flavors; the vanilla regular and soy are great. The chocolate, regular or soy, is pretty ok, the cappuccino tastes nothing like cappuccino but is pretty tasty anyway, the orange cream is pretty good, especially goosed with some orange and vanilla DaVinci syrup. Chocolate peanut butter wasn't so hot, but if you added some actual PB to it it might be okay. Strawberry is pretty good, too.