a/ Its "tree" display (very clean).
b/ its immediate compatibility with many "content article" components.
c/ the possibility to import previous comments already existing on my website.
In conclusion, I switched very quickly an existing site with comments to a new comments display, clean and beautiful.
On top the comments are in my website ... no need to use an external platform like Disqus, Intensedebate, or else. The users do not need to subscribe another service to place comments.