I drink it, and I don't drink coffee (one time I tried it, and I was bouncing off the walls!). I've been making cold tea (iced is too cold for my crowns) with yerba maté (or green tea), agave syrup and and lemon slices (organic lemons, peels and all) and keeping it in the fridge.
I didn't notice an appetite surpressant effect, but I didn't really pay attention.