So far so good... For one kid, but not the other
I can't testify to any results yet because it's only been 3 months, but I like that it has a lot less sugar than all other children's nutrition shake mixes. My 9 year old is not crazy about it, but understands it's good for her so she can drink it quickly (even more quickly on days I reward her with a little whip cream on top). My 6 year old has a more difficult time and drinks it's in sessions. I think the chocolate tastes great, but unlike most kids, I tend to like things with less sugar. For my kids, they only like chocolate, but it's not as sweet as vanilla, so I mix half vanilla and half chocolate and they tend to do better. It's quite pricey, but if I see progress in 6-12 months from their usual yearly growth rate, then it'll be worth it.