My husband is having his on the 11th and he has been on the pre-op diet since the 26th of sept. It has been a struggle for him because he can only have those certain things and we have 3 small children so I still have to make regular meals for them. So far he has lost 12 lbs I'm very proud of him. He has cheated twice on what he was allowed to have but has stayed under the 800 calorie limit they have given him. He is having his in Detroit, MI