Their performance would be best answered by someone that has experience with them. Expect all of the answers to be relative. Good, great, etc. means little. People new to them are also caught up in the emotion still. Many that have them, have little experience in keeping poultry. I am sure that some do though, and could give you a good answer. If you decide to get them, good luck. On the other part of the discussion, some breeds like Welsummers can be sexed semi reliably already. There are Welbars here, but I do not know that they are available. Redridge that stops in this thread is working on an auto sexing breed. I know a couple that are working on Hambars. So there are some options. . . . . and the Beilefelder is a fascinating breed. I am put off by the quality compared to the price. Obviously some feel differently.