This is the most popular in the Infusionsoft Community at the moment because of it’s extensive functionality and its large library of add-ons. However, be prepared to drop some cash to use this, because if you want the basic add-ons you have to have the minimum business license, and to have all of them you’ll be paying the full fare of $199 per year. The Infusionsoft add-on is free however.
It’s not the most intuitive software. There are LOTS of options, most of which you won’t need to have a registration form or an opt-in form. Gravity Forms in and of itself is quite powerful, but like a road car with 750 horsepower, you just can’t possibly use all that power in the real world.
The actual integration with Infusionsoft is twofold. First you have to create the form, which can take some time because you have to build it out in gravity forms and NOT Infusionsoft (and you wont be able to use the forms you already have in Infusionsoft with gravity forms). Then you have to map the fields in that form to the fields in your Infusionsoft application, which again can take sometime if you’ve used up all your 100 custom fields.
Unfortunately, Gravity Forms out of the box does not provide any fancy styling options to develop a look for your web forms. For that you need to create custom CSS classes and manually add those to the fields when you create the form, which is a bit annoying.
In conclusion, if you have to do quizzes, collect money, have multiple CRMs, or you need complex functionality from your web forms, I’d recommend this. However, be prepared for a learning curve and spending some time testing before being able to launch a form successfully.
If you need to create a form quickly, under the gun, Gravity Forms is not for you.