It really just covers simple applications of the Star Analyser and RSpec so if you have done any spectroscopy already or have been to any of my general spectroscopy talks (Chasing Rainbows, Science from Starlight, BAAVSS workshops etc) then it is probably not worth it. (Tom is a good software writer and speaker but he has mostly picked up his knowledge of spectroscopy from others rather than from personal experience)
Cheers
Robin