ZC and GravityForms? Has anybody done this?

I'm considering buying the GravityForms wp plugin to easily make better looking and more functional forms, and I'm wondering how easy it will be to integrate this with ZC forms.

Has anybody had experience using ZC and gravityforms together?

I figure the GravityForm will either Post to the ZC form, or perhaps send email to ZC form.

Any thoughts, suggestions, or examples of past experience would be very helpful.

Thanks in Advance