It works great ! I put some Wishard eggs from a nest I couldnt find under a broody Wyandotte and she raised 5 poults, did a great job with them and fussed over them much better then most Turkey hens, the Wishard had way too many eggs and only hatched 6 so I should have put more under the hen, worked out great when the poults from the hen got together with the Turkey hatched ones they hung around just fine.
I wished I'd had more broody hens but young Wyandottes dont go broody easy, its usually ones a couple years old, or more. They are valuable hens if you want to raise chicks, or poults.