I have been using MyHeritage for the last seven years, but only for the last one and a half year, I am a Premium member. Being Premium (paying) member, I got excellent results. Several months ago, I found a second-cousin of mine, her father, who was the cousin of my mother, survived the Holocaust, and built a family. Our parents never knew about each other.
Using Smart-Match and DNA-Match functions, I found many other family members.