Pros: Amazing layers of XXXL eggs, ranging from light to dark brown. Hardy and great foragers.
Cons: EXTREMELY bird aggressive. Not friendly with people and generally skittish/aggressive. Loud.
Though my birds were great layers, I will NEVER have them in any flock ever again. These birds are highly aggressive and they'll be your #1 source of feather picking, bullying, and cannibalism problems in the flock - unless, that is, you've got Delawares, Orloffs, or especially RIR.
The birds might not be that bad with other aggressive breeds that can tumble with them - but I'll never take on the stress of owning them again.
DO NOT BUY THESE BIRDS FOR MIXED FLOCKS. You'll be walking into a world of hurt!