Recently myself and Riverside Studios (http://riverside-studios.com/) filmed a small series of training videos for Pepsi Co and Gatorade. The videos included a small conference at a hotel and tours around their facility. We shot the video using 2 c100s and the brand new c200. We mostly used the c200 to get slow motion shots of the machinery working since the client only needed an HD deliverable.
One obstacle we had to overcome was the loud production floors. Using a lavalier microphone, we were able to get the mic nice and close to the tour guides mouth. This helped us get a more usually sound recording but we also added noise reduction and other audio effects to get a cleaner sound.