Fiba

I read an artical recently on a bb diet. It says to eat 100g of fat,15g of protien,nil carbs and a multi vit per day.
The theory is that if the daily intake is spread over 5 meals your body takes in 20g of fat and 3g of protien. Once your body burns the small amount of fat it is already in "fat burning mode" so it continues burning bodyfat until you start eating normally again.
The artical sates that the diet is only safe for 4 days maximum. After the 4th day you continue on to a high protien,low carb diet for 5-7 days before repeating again.
Also almost no muscle is lost because your body is constantly eating fat instead of muscle tissue

Have any of you heard or tried this before, if so what kind of results did you get?