A great test drive moved us to a paid version.
I test drove FlipHTML5 in the free version first, and it was very easy to navigate. The process, the quickness of conversion and the integration for the free version for so good that we made the jump to the paid version for our organization's Annual Reports to be house on FlipHTML5. The interactivity and the options to customize are great. And they have the best price among its competitors. It fit our needs perfectly.