Not everyone will pass the PHR, SPHR or the GPHR even if you purchase the materials from SHRM and to make a point, if you use other materials, there is no guarantee that you will pass. For the record; SHRM has never stated nor has HRCI guaranteed or inferred that the purchase of any particular study aid will result in a guaranteed pass! This is an issue that is NOT and issue.
The PHR, SPHR and the GPHR..and the related HRCI California certificaion are valuable indicators of a body of knowledge and as such, they do not guarantee excellence or competency..they are indicators of a BODY OF KNOWLEDGE. The HR practitioner is well served to posses these certification AND have the related experience and education....I would NOT hire an HR practitioner who did not posses an HRCI certification.