I must confess I am surprised at the recent bought of negativity here. I personally cannot get enough!
There is *some* jaw tension, but I only notice it for half an hour or so, and then its gone, I dont even bother with chewing gum after that. Other muscle tension doesn't really happen, either.
I dont have any problems with a comedown from MDMA, but it does leave you feeling a bit "wierd", whatever your definition is, no one can deny that.. But with Methylone, when its done, I find I just slightly buzz continually for a few hours.. stretching / stairs / dancing feels great. And best of all, you can eat, have sex, think quickly, etc,...
I also find I grin my ass off during methylone, in fact I was thinking of starting a poster campaign, like a pre election political party style thing, "MDMA vs Methylone. Don't gurn, GRIN!"
I find it a little harder to sleep on than MDMA, but more often than not its because I am so elated that I dont want to 'let go' of the feeling, or I am just grinning profusely.
All this combined with a constant wonderful high, as well.
I guess different strokes for different blokes, and all that