It's an interesting thing.
The literature says e depletes your serotonin in the short term.
In the long term, e may destroy your serotonin neuron terminals, and permanently damage your memory- not your old memories like alchohol, but your ability to properly form memories.
It says nothing about wiping out your cerebrospinal fluid- that's an urban legend.
There are lots of articles that say "nobody knows what ecstasy does."
This one for example.
I've taken e twice. Although I enjoyed it, the after effects stayed with me. I'm kind of sensitive to how well my brain is functioning, remembering, and keeping me happy. The second time I took ecstasy I felt different for
months. I don't know if it set off depression, or if it was laced, or what was up. You know that face tension shit that happens when you're on it? I still get that.
Whatever the literature says, this is still a very new drug, and we won't know what all it does until everyone who initially took it is quite old. If you want to chance it, fine, but don't let people tell you this shit is safe. They just wouldn't know.