I think that the only reason he doesn't like them is thy you're not re training yourself to eat healthily if you use them as meal replacements. If its the carb free and sugar free version they should be ok for post work out and even the odd meal replacement if nothing else is available ( even he has said that before in one of the web chats that I saw). There were some in e bay that were a lot cheaper than Holland an Barrett etc but you would need to independently check the nutrition details rather then trust an e bay seller I think.