My pullets seem to prefer to drink from a more traditional waterer, but I keep a nipple waterer in their coop. And when they were tiny chicks, I used one in their brooding box. They had no trouble learning how to use it. They seem most useful when you don't want water spilling all over and when you otherwise would have trouble keeping the water clean. Really, I think they are a great invention. But given the choice, my birds will always go for the more traditional.