The best thing about zen is that I can add lessons without spending too much time doing so! Adding new courses has been easy as well with their helpfull tutorials available online at no cost (which i highly recommend).
There are some limitations in terms of adding more than one lesson per week but this may be because we're only just getting started rather then being an issue from them themselves. It's super simple to use compared other platforms out there such as Udemy which require way longer training times before they feel comfortable using these tools.