Voice Comments in Google Drive documents

First off a clarification.  Google documents are one item in the Google Drive suite that includes things like Google forms and Google presentations, but now allow a lot of apps.  A new app is Kaizena allows you to add links (which you can already do), but also voice comments to a document so you don't even have to write anything anymore.  Above is the tutorial which I found from a Tweet from Rhonda Roysden.