It is very life changing... before I found MMM, I was frugal and made good choices most of the time, but felt horrible about it.... I felt the pressure from the rest of the world that I should be like them, and I even TRIED to make myself buy things and be more "consumer-like" just so I could fit in. I felt bad about myself when I faced comments like "What do you mean you don't like shopping?.. weird..." and "What do you mean you don't have cable? Your poor kids....." or "Why don't you go on a real vacation? You work hard, you deserve it" or "You have kids, so you need to get a brand new car for safety reason (or you are a crappy mom that doesn't care about your kids)...". After 20-25 years of this, you start to feel pretty crappy about yourself and wanting to conform... Thankfully I am also painfully stubborn and never caved in too far :)
So, MMM was life changing for me because I finally got permission to be myself, without any guilt, and actually it gave me a lot of pride about who I am and how I'm different. Now when people say these things, it makes me grin instead of cringe!