Have tried at 6mg. Effects were fairly light, but enjoyable. Two phase timeline (empathogen/stimulant followed by trippy phase) quite evident. Neither phase was particularly strong - I would have liked to push the dose a bit higher. First phase was weaker though, only some energy, mild enhancement of music/dancing, and some muscle tension. Second phase was strange - i felt in a psychedelic mindset, but while my thoughts while tripping are usually distant in time and place, they were quite the opposite. I walked down fairly crowded street (midnight in a college town on a friday) and was not uncomfortable around the people. Nonetheless, again, i felt in a trippy state.
(My first reaction to your question was "I sure hope ecstacy is better" - certainly it lacked much emotional effect at the dose I took).
Good stuff, but by no means a replacement for MDMA.