Used the module in my introductory biology course for non-majors. Although it had a touch too much detail for my group of students, they definitely had a light bulb going on when they saw the interaction of the different components. Areas of excellence: easy to use and loads easily. Areas of concern: none
The applet is exceptional, it runs really well when online in the classroom, maybe not quite so well over modem. The ability to use one of two options to view it is excellent. Might be nice to be able to stop it at certain times.