Gravity Forms is by far one of my favorite premium plugins. It’s so versatile and has a ton of features. I use it on all my sites as well as recommending it to my consulting clients.
If you are thinking about purchasing Gravity Forms, or just recently have, this video shows you just how easy it is to create a form. I also show you an example of one of the coolest features, conditional logic. And lastly, depending on which license you have, I will show you how to use the PayPal add-on (comes with the developers license). It makes it so easy to have someone purchase a service or product through your form without having to use those ugly yellow buttons.