I have gone through a bag of Genera Cissus 24%, and it tastes something like burned rubber. Definitely not the greatest, although I made it without capping it. I didn't notice any results when I took it, but I ordered another bag, and will probably give it another go after I find out how Yellow Gold works for me, and after my Trib Test log I'm going to start soon.
I know NP has a 50% cissus, 50g I think for $20 or $25 bucks, I might try that if I notice any results from the Cissus when I get around to it.