The content of the videos is very good, I wish I had this material 2 years ago. The examples are helpful but there should be more time to allow those following along to keep up. The controls to stop and rewind are not very smooth. The interface (Mac and iPad) is difficult to see the titles of each episode (why not have a text table view??). I have to launch the episode to read the title, cancel, move on to next eventually finding the one I want.