I had touched PowerShell briefly before, but hadn't really put a lot of effort into it. Although it turns out I didn't end up needing the instructors, and the material was a bit easier than I'd prefer, it was a very useful introduction of all the concepts involved.

I may have to have a look at doing one or more HOL sessions at my own pace... might get more out of that than hearing people speak about these topics because I can go as fast as I can... no boredom.