Great course! The lectures are very enjoyable to watch, much like watching nature documentaries. Overall the difficulty is extremely easy and requires minimal committment, which isn't necessarily a bad thing, especially if you are a busy person. In addition, all the lectures are made available at the beginning of the course, so you can watch multiple week's worth of lectures at once if you want.
To get the most out of the course, I recommend reading the included class notes, which go into greater detail than the lectures and contain some wonderful diagrams and pictures.
The only (very minor) criticism I have is that difficulty of the in-lecture quizzes varies greatly and depends on prior knowledge.