After recently viewing the entire tutorial, all I have to say is:
1. Highly recommended! Fast paced, in-depth, yet broken down into manageable bits.
2. I could see using STP for audio-only projects. The GUI is appealing, the meters are numbered and resizable, the Global Time View, the effects actions, the slip tool, etc.
Logic gives me plenty to work with especially considering that I do mostly MIDI projects. But I found much to like in STP while watching this tutorial.