I found out about spice about august of 07 and it wasn't as powerful as marijuana and had a horrible taste to it. (i found this out after going home on leave and smoking marijuana to going back to japan and smoking spice and feeling nothing but a bad taste in my mouth) The smell is more of an aroma then anything. The military has become huge with buyers and sellers (many going to the brig) We've all been told is undetectable in "piss-tests" so, that's why many do it.