Pros: Calm, cold hardy, handled hot summer, frequent broody
Cons: Frequent broody, average layer of medium to large light tan eggs, can be flighty.
I love my Iowa Blues. The roosters are friendly, but cautious around humans. They get six or so pounds and have white hackles and saddles on a mostly black body. The hens are smaller three to four pounds. Mine have gone broody several times, but have not pulled off a successful hatch. They aren't great layers, but fair layers of light tan medium to large eggs. My Iowa Blue hens seem to be the boss hens in a mixed coop. They are good flyers, so if in a run it should be covered.
I got them because my wife is from Iowa and they are a very rare breed. They aren't blue at all, but their black colorization can look blue at times.