you'll gain a lot, so long as you train, eat, sleep, PCT accordingly. i am guessing that you have some reading to do. try the search on this site. search "PCT" "eating while 'ON'" "training while 'ON'", etc.
don't take it until you learn how to use it. this IS NOT some n.o. supp. you will waste money and/or get hurt if you **** this up.