I am down 16 lbs in eight days of pre-op diet. Got 7 more days to go. Just had a Premiere Vanilla shake with sugar free Mangos and Pineapples. Wasn't bad. By the way my surgery is April 3. A week and a day away. Not sure if I'm doing this posting thing correctly, but I want everyone to know I wish you all success. My starting weight before the pre-op diet was 260 lbs, now I am 244, and may be less when it comes time for surgery. Excited and a little nervous, but need this surgery so I can get both of my knees replaced......probably end of next year, if I can't before.