Once I upgraded to Pro, I had some additional benefits. For instance, I could then change my recording to the system audio meaning that I could record the internal sound rather than having to talk into a microphone. This was a huge benefit. Other benefits included the ability to publish to Vimeo and Google Drive. There was no branding and I am able to password protect uploads. It has a desktop version for using offline for both Win and Mac, editing tools, scripts tool (for Close Captioning), Screen Shot Tool, Advanced Controls, Webcam only recording, and Draw & Zoom while recording.
And, to reiterate, all of this for $15 per year. I highly recommend Screencast-0-Matic! Excellent tool!