This contact form is perfect except for one huge thing. The message box starts off as a bar and has to be expanded by users. However when expanded, it expands infinitely. There's no way to constrain it. Such that, when a user expands it they could expand it across the entire screen an under/over other elements of the page like the sidebars or footer or anything else on the page.
I can't justify compromising my design for a something that should be simple. There are far too many contact form plugins out there to chose from. On to the next one.