I've seen some very successful showers using their products. But, just make sure you cover the basics,
- start with a good lamb (if it turns out you didn't, find out what are good lambs for next year)
- feed a good quality show lamb feed
- weigh your lambs routinely and know what weight the breeder recommended you show them at for their peak potential
- have your lambs leading great and setting up consistently
- have an exercise program that matches your lambs weight and maturity pattern
No supplement will fix a lamb if you don't do the above right. But, if you do all the above well then some of the supplements can help you go that next step.