One of the features I personally found nice about YARPP is the ability to add to/change the HTML tags that the results are displayed in. For users that may know how to add a class or an ID to a tag, but run a high risk of “breaking” a PHP script by altering it, this is a nice feature. Also, the output at the right in the Dashboard was handy to me, as it gave a bit of assurance that the changes were being saved once I clicked “update”. All in all, I’d say this is good plugin from a usability standpoint. I hear good things about it’s actual performance, so I look forward to seeing how it works out.