Hey,
I used Hoodia for a while. I took 6 pills a day, which became expensive! And, I didn't see much result... my hunger subsided a little, but it may have been mind over matter. However, my mother swears by it, and says it's great.
If you go for it, make sure you research which kind to get. Some are bogus. Get one with the cirtificate of authenticity. DEX-10 is the type I used.
Good luck!