They set them up with a variety of dips, right next to a "Magic Pop" machine that apparently produces the rice cakes (although it wasn't magically popping while we were there). After several free samples over two different trips, we finally bought a bag.
Now, we first have to say that we kind of like rice cakes. Sometimes we need a crunchy fix, and they are good vehicles for peanut butter. We found these to be a nice upgrade from the uniform, puck-shaped variety.