Pros: very productive, economical, matures early, never broody
Ours was really friendly. She made a good pet chicken. For egg laying ability, Leghorn is hard to beat. Our Our Leghorn, Joey, didn't eat near as much as our Buff Orpington or Barred Rock. I have heard some strains are not as friendly and kind of skittish, but that was not our experience. However, we only kept one.
Our leghorn laid 2.0 oz eggs 6 to 7 times a week. She started laying at 19 weeks old.