I had been using this component since 2.1.2 (about a year). I am continuously upgrading the component to the latest version. I recently had a problem with the component and problem was very weird because it worked on my development site, but not on my real site. It took a few days for the guys to figure out the issue, but they were able to point me in the right direction to figure out the problem.
The problem was with JoomSEF default configuration with their new version! I would have never figured it out if it wasn't for these guys.
Must have component for your site. Since my problem with this component, my hit rate dropped by 50%!