Mass gainers are good if you don't have time to eat , but real food trumps supplements anyday ,
Most if not all mass gainers make you fat they are filled with shitty garbage fillers and carbs that are useless to you're body why do you think they cost less or the same price of protein power see it's because they are low quality
The protein in them is even worse ,
If you want a mass gainer shake grind up some oats and add protein ,
I know a guy who use to work for magnum and their mass gainer and many use cake batter for the carbs it's cheap and fills you up
Post workout you're still better with someone cleaner remember the cleaner the source the cleaner the results
Hope this helped
Enjoy