I got the 'Spice Gold' stuff a few times as a temporary tie over and to be honest, its crap. Costs about 20 squids and as someone said above, it justs gives you a headache. Personally, for me, it makes me go freakishly paraniod when I try mellow out and sleep my mind/imagination runs rings round me. Really nasty. Its murder to try get to sleep on. Makes me have small fits of quite severe depression every now and then and makes your eyes water the morning after. Never had that when I used to real deal.
They should ban that crap, to be honest!