Your overall calories are what matters. Weight Gainer shakes only make you gain weight because they are so heavily caloric. Heck, I got a sample of some by Universal which are 200 calories a pop which is just 1/4 the usual serving size, and I used 'em as a meal replacement in a pitch in the mornings whenever I wake up late because I had to do overtime the night before. Now, you should only split these up to your caloric needs. If you are eating the calories you need to "bulk", then don't bother with a weight gainer since it'll just make you fatter, faster. This one you are taking is 750 calories, which is a lot to add onto your normal diet and to consume that much food plus your usual diet would be quite expensive and time consuming. You should do this as a meal replacement or add-on, but if you can eat real food, then eat real food.
if you want, do lots and lots of almonds since they are mostly fat and thus, are highly caloric. No "protein powder" will give you steroid results like you see in the ads.