Tis shite, I can't really think of any reason to take it over speed.
Like I say it does has a strange compulsive nature to it, started me on the booze in a big way as well.
At the time I could get decent speed any more, round my way the quality of coke fell dramatically just as Meph become more widely available, I think I brought coke once after doing Meph for the first time.
I have never bought it - but my mates used to spend a shit load on it (stupid money). I could get an oz of base that would have us all majorly fucked up for days for the same price they were paying for a few lines each. I miss good speed

