My Svart Hona are among my favorite birds. They always come over to interact or see what's happening when I go to the coop/run and neither the hens or roosters have shown anything but the best behavior. My SH rooster is my dominant flock rooster and is easy when mating the girls. He's in a coop with 14 pullets and another rooster (barred rock bantam) and they get along fine - both crow, both mate the hens, etc.
I hatched a few just to add to my flock and all ready planning on expanding in the spring and eventually moving them to their own breeding pen (along with some hobby project crosses). I can't recommend them enough - the only down side is that their production isn't great, but I knew that going in.
Pros - Memorizingly beautiful, calm, hardy, friendly, good foragers, good flyers, play well with other breeds
Cons - Too small to be a good dual-purpose breed, historically hard to aquire, a little shy, the bottom of the pecking order in my mixed flock
Very happy with my Svarthona. They are great birds. Healthy and even tempered, if not a little shy. Good with my kids. Absolutely gorgeous. A hit with friends and family (even "non-chicken people"). As someone that raises birds for eggs and meat, my only wish would be that they were a little larger.
Pros - Smart, interesting, regal, excellent fliers and foragers.
Cons - Rare and expensive to aquire
This is one of my favorite breeds in my flock. They are a small sized bird but larger than a bantam. They are very beautiful birds who shine in a black, greenish sheen. Reminds me of an 80's prom dress, My roosters are very good at looking after their ladies. I have two roosters over two hens and 5 black isbar hens and a blue isbar hen. They all seem to get along great. They are no louder than any of my other breeds. They are a black melanistic chicken. My girls just started laying a couple months ago so, i am really not sure how they are as a layer. I read 90+ eggs a year. The egg is larger than a silkie.