Because I'm attempting to do this on a live production site, I'm calling this one broken, although the errors may be simple fixes.
1. When creating a new site, the new "path" that is created has an added trailing slash by default which breaks things. I resolved this problem manually by editing the appropriate line in the DB table (wp_site, field:path). But, for the average user, this isn't a great solution.
2. I have no idea how to get to the newly created Network Admin area for the new network. Your instructions say
Go to any blog backend on the new network. As a shortcut, click the number under the Sites column in your new network’s row.
But, the Network Admin menu remains unchanged, and there's no obvious way to switch to the other network admin that has been created.
3. Noticed that the "Update Network" yellow warning box persists across the top of the newly created site, no matter how many times you update the network. Also, when you do this update, the newly created site isn't included in the update process.
I'm hoping that these are easy solutions within the plugin code someplace, as I would welcome the opportunity to use this tool to make my WP Admin life a lot easier. =)
Please let me know if there's something I can do to help with the process.