I would rate the ease of use a 10 out of 10 after spending about 9 minutes watching and listening to the Webcast presentation/quiz on Camtasia. The music during tranistions and the images, like the Wordle are a nice addition to keep the viewer enaged. The history of Webquests and application was helpful as reminders of this "old" technology tool (it is old coming form 1995, right?) :)
I also thought the small chunks of lecture and illustrations broken up by quizzes is a nice way to review and learn the who, what, where, when, why and how of Webquests. I even had a chance to look at my answers, and if they were wrong, I could re-watch and listen to the video segment. I would use this is a class with pre-service teachers for sure, or as a nice addition to a website on tech tools for teachers!