How about the Opal legbar's personality? Are they more flighty? It looks like they may have isabel leghorn bleed. Can you tell their gender easily? They are very beautiful with or without a crest. I even don't mind if they lay brown eggs.I'm not really a fan of the cemani's either. I think they were hyped beyond their truth. For an all black bird I am happy with Black Ameraucanas (blue eggs) or Black Sumatras (fabulous tails). Some people really like them, so I am happy that I can hatch some.
The Opals never seem to be as well crested as the Rees Legbars. I plan to work on that by crossing them to my line of Rees until I get good crests and all blue eggs. I haven't take pics of mine yet, but they are pretty common online.

My Reese legbar girl was super friendly as a chick and became skittish until she was close to lay, then she became as calm as the other girls. However, she didn't start to lay until 11 month old, so she was skittish for a long time! Weird thing is: no matter how skittish she is, she loves to perch on my arm and will fly to my arm herself. My old legbar Dolly was the same. If they fly to me, they will allow me to pet them while they will run away any other time. Silly girls! Out of the 3 oliver eggers, two of them love to perch on my arm. Of course, Dragon is quite heavy, so I cannot hold her for too long with my arm up.
Her eggs are just like her-- very round!
That's how I can tell her eggs apart.