I would recommend never to try this substance, if you haven't.
It will take over your life, and nothing else will ever satisfy you.
This is not like MDMA. In the event of Mephedrone being unavailable, you'll seek something like Crack or Heroin.
It also appears to have drastic effects on nasal tissue, as my nose appears to be severely damaged, and I've only been taking it for 5-6 weeks. (Around 8 Grams in total).
The high is ultimately amazing, but due to the side effects, and extreme fiending, I'm really not sure it's worth it. You get half way through the week and can't stop thinking about the Mephedrone you'll get at the weekend.
The dangers involved in taking the drug are also terrible. I find bombing it has terrible effects for me, as with snorting I know basically instantly if I've taken too much. MDMA, Methylone and Coke are far less toxic, and much less risky. If anyone is interested in trying Mephedrone, DON'T. Try Methylone instead, it appears to be FAR safer.
I read posts exactly like this before I took it, and thought, nah, it'll never take over me, you know what, it has. If you do decide to ignore my advice, PLEASE be safe with it, do not mix it with anything, that includes alcohol. The paranoia associated with it is also terrible, you may think you're going to die, but if those thoughts arouse, just sit down and be calm, it's unlikely that if you're in the state to think something like, that it will actually happen. The comedown is also a major disadvantage. Severe depression for 30-60 minutes followed by hours of feeling sick, headaches, and cravings for more. Diazepam/Valium can help with the comedown.
So overall the conclusion is - DON'T DO IT.