I think they are wonderful. I can only speak about mine, but their behavior reminds me of having cats - they are not unfriendly, but don't have the "lap chicken" thing going on that some other breeds have (a few of mine have been an exception). Mine lay well, and blue eggs are always appreciated more for some reason (though, yes, they are essentially the same). They forage well, take care of themselves well (know to get under cover before all the rest when a hawk comes) - I think that if all my chickens suddenly had to fend for themselves, the CLs would find it easiest. They are well camouflaged. You can tell boys from girls a hatch (which is AWESOME).
I am not a breeder, I do not and will never show chickens, but they are a great backyard bird. I don't think I'll ever be without some in my yard.
- Ant Farm
I would add that I love my CLs, but be warned they can be real LOUD - mine aren't shrinking violets, as I guess is typical, and will let me know long and noisely if they want me to do something, like trot out the treats a couple hours early.