So far the book is pretty average in my opinion...I was not very happy with the fact the author made it seem as though there was only one accepted way of salah rather than acknowledging the four schools of thought. He seemed to only discuss the differences in opinions between the Four Imams at certain times. Other times, he acted as if the disagreements didn't exist.
I felt as if he rarely acknowledged the differences between the prayers of men and women. The default was that I would be a male reading this book and that made it feel incredibly average and uninspiring. He would mildly mention things he thought all shias do, like praying on holy dirt, when this is not the case. I felt it was inappropriate for a book on correcting errors in prayer to not fully discuss the issue of the turban/Mohr, and this is just one issue out of several that I found that were not properly discussed or didn't really fit in with the book as well as the author probably intended. I believe that if one feels there isn't enough room to explain it then do not go into it. Perhaps make a new book or essay if the section would take up too much space. If there is enough room for this topic to be mentioned, then it should be explained in full.
Overall, I felt like it was a good attempt at helping others correct their prayers and the associated issues surrounding prayer. However, I felt there could also be some improvements too.