Yes, been waiting for this one. We covered as much as we could. The fact that people didn't have their own machine was both a bit embarrassing as well as frustrating as it took too long to get all stuff working.
In the e-mail it's mentioned people should have their stuff in place before we start, but still they ignore it. I don't know for sure what to do on this, but it would be great if this statement would be applied a little bit more strictly. In this case people could've downloaded the zip file from the website and not install it by composer.
I have learned some stuff about Doctrine2, but I can't deny the feeling that we could have done more with it. From what I've seen we've only covered the tip of the iceberg, so hopefully there will be an advanced topic on this.