This is a great tool. You can even share an example of a post and it will capture the framework (Newsletter or post) and then work the info in your transcript to follow the example's framework. That is so useful!!
It's also great way to do voice notes of ideas and develop out the ideas. I have an Android so I have to upload my voice recording manually from my Google Drive to CastMagic, but it's not a big deal. There is an iOS app that does this for you, if you have an iPhone.