Sounds pretty interesting, I have dabbled with most commonly available prescription benzo's in Australia at one point or another but have never tried any of the more obscure benzo's although I would certainly like to!
I am a huge fan of benzo's although I more often use them for therapeutic reasons (both anxiety and sleep) and potentiation of other drugs than pure recreation on their own these days.
Sorry to resurrect this thread... but found some new info on eramin5 or happy5 or Nimetazepam and thought you might wanna know more about this, since searching it here is kinda non-existant.