I max'd out on the Hoodia caps and it did nothing for me. Sassy, however, completely killed her appetite ... With anything, I'm sure it depends on the person, but from what I've read on here Hoodia has not been all it's hyped to be.
T-Rex always works for me re: with the app. suppression. I bought the Synephrine from the AF store, which is an ingredient in T-Rex and it was decent.