Nested structs are really neat. I'm working on a project where I'm querying dozens of external API services, and I had to create a separate type structs for each JSON object just to get the interesting info nested in the response.

I wonder why he's using a chan struct{} for the quit channel. Is there a reason for that? Is it more efficient?

Usually I use a boolean for that:

    quit := make(chan bool)
    <some code>
    quit <- true