i bought one a couple weeks ago, it took a week to open up the way like the pic of yours looks, but by last weekend it was closed up again and has not opened up much since, it doesn't look good, I understand they like low light and high flow, I've moved mine several times to try and find a place it likes but it still does not seem happy, I know one site that sells them claims it to be a difficult coral to keep.
Good luck with yours hope it does well, they are neat looking.