My experience has been that spice in scooby's is rather nice, but never a breakthrough experience.   Sometimes it's fun to "low dose" - particularly with a carnally minded partner to share the pleasure.   Low dose in a scooby certainly does something majical for the orgasm experience, and has led me to hypothesise that orgasm may involve a slight DMT release (along with other neuro-soup).   Problem I found trying to break through with heavily spiced scoobies, is you have to keep coming back to deal with it, ie find the ash tray, take another drag.   By the time you are almost there, you couldn't be bothered with the scoobie anymore...   My experimenting is also suggesting that if you want to break through, do a scoobie minutes before a big boost, but not hours before.    Seems like either the neurons get tired of spice, maybe temporarily run out of neuro-soup chemicals to release.