At the Headshop that i frequent, everybody swears by Krypto by international odditites. I bought a box and must say it was nice, a very subtle, mild "high". The only thing it was really good for though was an additive to blunts when i didn't feel like wasting all my nug.
lol, i did this with some legal "bud" that I got. It was great for making blunts bigger. I think bigger blunts smoke better.... my friends thought i was nuts, lol.