I recently installed this plugin on my site and had some issues with the way it was displaying as well as a conflict with another plugin. After contacting the developer, the issues were fixed within 24 hours. Can't say enough about the support for this plugin.
As for the plugin itself, it does what it is supposed to do very well. The interface for setting up forms is a bit clunky, but I can live with that for the quality of the displayed form.