It's super-convenient for installing apps that are already part of the ecosystem, but installing unvetted apps is less so. When they say you're on your own they really mean it. I don't like the workflow of being able to maintain some apps through the web portal, and then having to SSH to the machine for all my custom apps.
I'd prefer a middle ground between Yunohost and, say, bare-metal Debian. But I think I'm just going to have to get stuck in and take the long way around to proper hosting. It'll take longer, but I'll learn more.