New gradaute students who are receiving an assistantship are required to attend. This training is also known as Grad 701.
I taught for 6 years as an adjunct, so much of the material was not new for me. I'm also not even teaching this semester, but working as an advisor, so it didn't even apply to what I'm doing. I have my own insurance, and have done several years of harrassment/safety training (although I understand why there is a need to refresh those areas). The training was well thought out, for someone who is completely new, but I didn't gain much personally because of my own position (I've worked professionaly as an adjunct and in student services, and I'm not teaching currently.)