I have used the other editions mainly as a reference to many medical conditons which I hear about in my practice as a psychiatrist. As usual,the latest text provides the information but there is no attempt to bullet or separate out the most important stuff - and no beautiful color diagrams as in Cecil's. Of its many strengths, the HIV chapter is authored by Anthony Fauci at NIH, a renowned international AIDS expert. If you want to keep up to date the ...price is a bargain. If you are a student choose what is most helpful to your style and use the study guide for board practice.