Formidable is by far the best contact form I have seen for WordPress. It is easy to create and has had zero issues with form deliveries. What makes Formidable unique is it’s ease of use and reporting capabilities. Takes all of the guesswork out building a form.
I'm really liking the new Formidable plugin. All the functionality of Contact Form 7 with a much better UI .... I feel like I've finally found a form-maker plugin I can safely hand off to clients!