I tried a bunch too. I am a Costco nut so I got their EAS Bag, Vanilla Powder. Not bad, especially if you mix fruit in it. But for convenience I got the Muscle Milk Light, also at Costco. I didn't think I would like the chocolate milk, but I do! It's great to take to work too. My doctor approved both. Slim Fast, I was told was high in sugar and carbs. I was told to look for at least 15 grams of Protein, 0 carbs and 0 sugar if possible. I only wish they would let you sample them at the stores before committing to such a large bag or container. Trader Joes has some good ones too. Good Luck!