In the vid the chap found that it allows him to swing the scope vertical so when doing flats he can rest the frame on top, he couldn't do this with the Skywatcher app. It got me wondering if controlling it through the serial port would be better? I have no idea myself as I'm at the stage where I don't even know enough to be dangerous yet.
Which is why I'm raising points/asking questions that may have the more experienced on here scratching their heads in wonder. If I'm way off course here please let me know.