Performance advantages?

I'm probably a little biased (and sreynen might chime in and prove me wrong ^_^) but the basic idea is that because this module works based on the the concept of info files (and which fonts get used are saved to the variables table which gets loaded up), there are fewer queries happening against the database and the objects themselves are usually fairly small to parse through. The codebase itself is also fairly small and as a result should be a little faster than @font-your-face. However, I don't know how the performance stacks up against the features/theme portion that @font-your-face now offers.

Best of luck. I actually did a screencast on the two modules a few months back - http://replay.uci.edu/clients/drupal/DrupalCampLA_2011_-_Drupal_Modules_... so you have an idea of how things should get set up.