Importantly, it may be neurotoxic for heavy users, though. It's actually probably by far the most neurotoxic drug that's commonly used recreationally. (Believed to be due in part to the acute serotonin release, and reactive oxygen species, and risk of overheating.)

This is not at all to scaremonger - just to encourage people to always research things very carefully before they consume them. https://rollsafe.org/how-to-take-mdma/ is an excellent resource.

I've used it, had a great time, not much comedown, and would probably use it again, but I was cautious to follow all of the advice on https://rollsafe.org/how-to-take-mdma/ If you're popping moderate or large doses every few days as if it were Adderall, you're potentially risking the chance of long-term or permanent brain damage.