KRAV MAGA please answer or take a look,?

for anyone who is trained in this fighting style i would like some help, i here it is one of the most effective fighting styles in the world and i have herd it is just a scam, i am still young, started mma, when i was 5 and did it until now, i have 11 solid years and i learned Alto but i am missing some vital knowledge that krav maga teaches, weapons, ETC, i did some research on it and what it seams it seams to fit all the things im missing, i want to know if its a scam or not, i always put forth all i can torwards what i do and i have good discipline so should i take this, i am Very interested in learning it, don't worry im not one of those kids wanting to learn it to brag or kick @$$.