I obtained a small batch of Carni queens a couple of years ago from another bee keeper (honey run apiaries I think it was) and I very much liked these queens. some folks report that they swarm excessively late in the season but I never really noticed this trait myself. if I was a northern bee keeper (god forbid) I suspect Carnis would be my breed of choice.
I have the Carni breed, (debatable? i'm with rat on this) they tend to build up fast in the spring and are pron to swarm more than other breeds i've had. They are gentle to work with and good honey producers.Larry, do you raise queens to sell in the spring? i don't need any now but will next year. Jack