I've had some birds with this cross and I've loved them. The hens were the foundation of my layer flock for a few years. They laid huge, light blue or green eggs with surprising regularity. Very good production birds...mine were brown Leghorn, not white, if that makes any difference. Personality wise, they were fine. I'm not one to make pets of my birds, but they were friendly enough, usually toward the top of the pecking order. As they got older (I think the oldest was 4) they did get kinda mean toward the newer pullets, but I think that was more a cranky old lady thing than a breed thing. Even at that age, they were still laying 4+ days a week.
My birds were hatchery stock from McMurray hatchery.