Seminar is a great extension that does what it promises and does it well.
I am very impressed with the wealth of features, and with the fact that Dirk offers a copyright removal option for free (still waiting to hear back on this one, though!)
I only wish that the translation was a little more accurate because some of the settings are not very intuitive. However, I was able to answer a few of the questions I had by visiting the forum on the website, and I'm confident that the ones I have asked will be answered soon.
Great job and thank you!

Fantastic extension. Installation was a breeze and it works really well.
Thank you!