Does the job perfectly, and adds no bloat

Comparing this to the “Table Of Contents Block” by WPDeveloper, I prefer this one because:

1. It just works automatically.
2. It has less options, but just enough to do what you need.
3. It adds nothing to the frontend to cause bloat. No CSS, no JS. At least not right out of the box. Additional settings can be enabled that will add these, but it’s nice that we have the option!

This is an example of what a well-written plugin should be.