I've been taking T'ai Chi classes for several months and I bought this book hoping that it would supplement my instruction. I have an excellent teacher but there are so many elements to each movement that I thought it would help to have static images that I could examine at my leisure. I haven't found this book useful in that respect. The main problem is that it's not clear how the pictures relate to the written descriptions of the movements. Even for sections of the form that I know very well I am often unable to figure out which movement the pictures are trying to convey.