You can't get a better perspective on IPO / IGP / Schutzhund than from Frank Phillips.  He's a top level judge for the sport as well as a top level competitor on a world level.  He's stood on the international podium on several occasions and judged countless trials.  He knows the sport inside and out and brings almost 30 years of experience.  This is one of my all-time favorite podcasts and it will be for you too!