Surprisingly good. I would've never thought a sweet potato and cardamom would make a good smoothie. I made some slight changes in the recipe: I used one large sweet potato, 2 small bananas and 2 large granny smith apples and I added the juice of 1 lemon. I left it thick like an applesauce consistency but you could add more of the sweetpotato water if you want a real smoothie texture. Would make great baby food and I think the recipe would still work very well without the cardamom, if you don't like this spice.