Rating: 5 stars

Changing the styling of Gravity Forms submit button so that it fits in your theme is always a struggle. Gravity Forms support is not of much help, while it should not be difficult at all. In my case, I just needed to change the class-name of the button. The plugin does exactly this. Problem solved.

Rating: 1 star

Not working anymore.

Rating: 5 stars

I’m able to add classes to submit button independently without using the filter. Without PHP notices or bugs so far.