With an undergrad degree in chemistry and a year of graduate school (granted, without a focus solely in biochemistry), this text was often difficult for me to follow and gain much from. Though the text contained an impressive breadth of topics, this breadth came at the cost of depth. In my opinion, a textbook should more-or-less stand on its own in providing a clear understanding of a topic. All too often I didn't find this to be the case with the Fersht book. Instead, I often had to consult many of the references listed in the text to obtain sufficient understanding of topics. (Fortunately, the book includes extensive reference lists.) If looking up endless references (many old and sometimes difficult to obtain) is something you enjoy, this book is for you.--If not, forget it!