For very general understanding of Interior Design and as a study guide the NCIDQ exam this book is quite good. Be aware that as a tool for real world design solutions, it is lacking. The authors design philosophy and methodology are terrific, but the design solutions have problems. (example: A door entering into a two stall toilet room swings into the sink area. Anyone standing at the sink will be hit by the door when another person enters the room.) Although, if the reader has enough understanding of real world design conflicts and can spot the design errors in this book's illustrations, then the reader has gained the skill necessary to provide good workable design solutions. Many of the illustrtions do not comply with ADA guidlines, which is NOT necessary for passing the NCIDQ, but essential for the workplace. North Carolina, the state where I practice, has codified the ADA guidelines. Use this book as a study guide for NCIDQ. Be aware of design flaws. Use it at the office for philosophy and methodlogy only. If you are studying for NCIDQ, good luck, keep it simple, and parrot back everything that is required in your design solution. Do your finished design in black ink and write notes for everything.