I am not as familiar with that feed. A lot of heifer developer rations are similar, so it comes down to feeding the right ration to be successful in the showring with it.
We feed a mixed feed that we have mixed, and then add in cotton seed hulls and a few other ingredients, it works very well for us.
Last year we fed Show Chow and it worked awesome, but it is pricey. That is why we started feeding our own mix, and we use Show Chow top dress.
Anyway, like I said I am sure that heifer developer ration will work good, as long as you feed enough of it. Good Luck.