Con

Every ounce of fat you gain will one day have to be dieted off also every new fat cell you create will always be with you for the rest of your life. So unless your a skinny teenager and can afford due to a very high metabolism to eat fat maker shakes like that then i suggest a more conservative approach to gaining weight personally i will from now on be going on a 1.5 gram protein 1.5 gram carb 1 gram fat per LEAN pound of body weight forget trying to gain 20 pounds in a month gain 2-3 pounds per month think in one year you can be looking at around a 30lb increase hopefully most of which will be muscular tissue and not just a fat gut.