BreezingForms have made it extremely simple to create a form in a matter of minutes. It's focused on user-centered design, which is imperative for any website and form. It has HTML sections which preface each form page which makes it extremely easily to customize it for each site. BreezingForms is also very forward with allowing you to use it on any site. Again, an amazing value.
A couple other extremely notable features...
-Nested sections. Trust me... you'll want this!
-Drag n'drop interface. Again... you'll really appreciate this.
I'll conclude the review on their service. I've had two questions, and they've both been quickly (and accurately) answered within a couple hours.
It's a quality product that's extremely well-priced, with a responsive team. You can't go wrong here.