I know, that's an old thread, but: I'm one of them who got in real trouble (and I was no beginner, (I was DF's (germany) coAdmin and did much experiments regarding pharmaceutical opioids since 2003 and 2004 for stimulant-drugs). Tried it in 2008 first and was hooked instantly! I took it until end of 2012, kicked it then and recovered 2013. I highly recommend not to try it, it is much more addictive than Methamphetamine (even though it doesn't cause that damage to the brain). But I have masses of experience so if you have particular questions, don't hesitate to ask!
Best regards, Fenta