lol. ya i have a lot of experience with different synthetic blends, as well as lots of other new stuff that's better than spice.
jwh 018 used to be legal, but then they made it illegal. there's other jwh compounds though that they fill these blends with instead now. some are of the "am" series, etc. if you find a good blend, you can actually get a pretty nice high. i wouldn't combine any of them with alcohol though, as i feel the synergy isn't good like it is with weed and booze.
i picked up some stuff from the smoke shop (not one of those rip off name brand blends like you had), and for $15 i was basically stoned for 4 days straight. the days were all starting to merge together, cuz i'd wake up in my bed and it would be like the next day, and then the process would repeat. i still have over half a bag left of the stuff. at one point it actually started producing some slight visuals, as there was a very different feel/look to the room.
personally, i stick with herb though. i'm not a huge fan of the synthetic cannabinoids.