I am trying to bulk up and this helps me hit my caloric requirements for the day. Use this in addition to a healthy, whole food based diet and it will help increase your calories significantly. I find it easier to drink calories than eat them (obviously) and this goes down well. It's smooth (blends well), tastes good, and has some good ingredients and macros. I didn't want a gainer just full of simple sugar (yuck), and this one contains some higher quality, more complex carbs which is great. Serving size is 3 scoops but i would start with like 1.5 scoops or 2 scoops for the first couple times as using something like this for the first time can upset your stomach. If you still need more calories then go for more scoops, but build up to it so your stomach doesn't get a huge shock. This can fill you up but don't use this to replace real food. Use in addition to real food and what youre currently eating. My first month using it i am about 5 kgs heavier. Of course i have been eating a lot of real food too and tracking my calories, trying to hit a 500 cal/day surplus, and without this i wouldn't be able to. This tastes good on its own and makes it easy as to get enough calories, but to make the shake more effective i like to add thing like peanut butter, bananas, berries, avocado etc. If you're looking to get bigger then consider this as it does help! Its not the cheapest gainer out there but i would buy this one again as it seems like better quality. Per serve the cost isn't bad though and if you're using less than the 3 scoop serving per day this will last you longer than a month. One more time TRACK YOUR CALORIES and it's easy to put on weight with this. If you think you eat a lot and you're not putting on weight you are not eating enough. Simple as that. With a full serve this will give you an easy, extra 950 cals. So if you don't think you can physically eat enough to put on size then drink this and use it as it's intended, as a supplement to a proper diet. I will be getting another bag of this soon as i am almost out. Good luck with the gains!