When I was 19 years old I went to a rave and took a pill which definitely contained MDMA (in addition to whatever else the dealers put in it) and what I will say is this:
It was literally a life-changing experience for me. I felt emotions that I had literally turned off, and walls I didn't know I had were opened up. I remember being shocked days later, when I realized that the drug was no longer in my system, and yet I was smiling and making eye contact with my roommates and classmates, holding real conversations with them. These were things that had been pretty crippled in me before.
MDMA is powerful stuff, and it's a shame that this hasn't been properly researched due to our Federal Government's juvenile, ignorant attitude on drugs.