I really like them. These birds are beautiful conures but seem to lean a bit more toward being like macaws in personality and character. Many pairs will use a wooden cockatiel nest box, which I still use for some of my pairs. I also use boxes a little deeper, about 18 inches deep, and that works well for them, too. Pairs usually have one or two clutches a year of around three eggs each.
Blue crowns make excellent parents.
If you want the chicks for pets, babies should be removed before they are 4 weeks old for hand-rearing. These babies are very friendly, love attention and make great talkers. I have no problems getting my hand-feds off to their new homes. Stores always seem to be want blue crown chicks, since they sell quickly and stay very tame even after they are weaned. Some species of parrots get a bit nasty after they are weaned and not handled enough, but blue crowns stay tame, since they are real people lovers.