In the midst of my studying for the Orals, I have discovered that I use this book much less for the Orals than the I did for the writtens. Rarely some of the information is not up to date or wrong. The differentials are not weighted. For example In case conference, if you get a "double bubble" differential just start off with Ladd's Bands as your leading differential ( from the LADS mnemonic). Your Pedi examiner will shoot you down in flames. I am using Wittenberg's Primer much more than Danhert. Danhert's new edition is an improvement, but it is a limited resource.