Ok here's the facts:
99% of ecstasy related deaths have other drugs and/or alcohol involved.
The very few number of cases of deaths from ecstasy (MDMA) alone are almost always caused by dehydration or the reverse, overhydration. Overdosing on MDMA alone is very difficult to do and extremely rare.
You are more likely to die from taking aspirin than from taking Ecstasy.
Ecstasy causes short term depletion of Seratonin in the human brain.
Long term effects of MDMA on the brain are currently debated and nothing has ever been clearly determined because nearly every study I've seen has been done with subjects with a diverse drug history. How can you determine if MDMA causes brain damage or changes when the subject has used many different drugs over their lifetime and/or cocktailed drugs?
Using MDMA sparingly is probably more healthy and the drug should be approached with caution and respect. Less is more with MDMA so don't overuse it and you'll be better off in the long run with better experiences and less side effects.
Oh and as an aside:
99% of people, both users and non users, don't know jack shit about Ecstasy but seem to think that they do.