it is a MUCH longer read than BRS. But I believe it would take me reading BRS 3 times to understand the material as well as reading the big costanzo once. I plan on reading it once then using BRS to review, however, when the boards come around. Going through big costanzo once, makes going through the BRS book super fast and easy. But IMO, if you are going to just get one, get big costanzo, unless your physio background is already strong.