I bought one and have been using it for 2-3 weeks. I'm not really following a program. I am making them the shakes mostly according to their directions, using spinach, fruit, nuts, but am adding vanilla yogurt instead of plain and milk with a small amount of water. Without the yogurt, it was pretty bland. I have been drinking them for breakfast and lunch during the week at least. Weekends are less regular with at least one on Saturday or so. I think it is too soon to say I might lose weight, but I am down a pound or so. Anyway it is good for me and my belly, which I had been having a little bit of indigestion problems.