I really liked this plugin at first and I think for everyone else on the WordPress planet, it will probably work just fine.
As of WP 3.9 and this plugin 0.7.2, I found:
If you have made any modifications of your own to the comment form (eg: removed the "website" field and such), this plugin will not respect that. It displays the default comments form.
For sites that allow comments without logging in, it displays the word "False" in front of everyone's name, even if they did log in. I don't know what's up with that
It does not work in Opera. Not a huge deal if you're not catering to the Unix world, but should be noted.
However, it behaved itself under Multisite, which snowboard mommy always enjoys, so I cannot give it a bad rating.
Hope that helps!