This extension has a plethora of options, but they're not well organized. (Look at the settings for any popular IDE for how it should look.) What I needed was A) an assurance that the default settings would not modify YouTube at all (or at least a summary of the default changes), and B) a quick way to discover if the specific feature I need actually exists in this plugin.

Without A), I have to read and understand *every* option before I can rely on this plugin, and without B) I don't even know if it's worth the effort or not. In summary, the new-user experience suffers from the sheer magnitude of what it can do.