I just received a peak FCB4N2 in the mail... and wanted to share in case any one else was thinking of getting a cheap foot controller.
The FCB4N2 is tiny! Smaller than I thought from the images, but that is good, I don't have much room. Setting it up was a breeze, and I am very happy with it! It isn't fancy or programmable, but does what I need (switches between rigs).