South Devons have good and bad things like all breeds. They typically have a good disposition and big rib eyes. Very good meat quality as well. Typically have some frame to them and have a little of a milk cow "type" to a lot of them. Udder problems can be there with carrott shaped teats in some lines. Bollenback (Cimarron) genetics have excellent to good udders. We never had a bad one out of them. When pure, watch out on the birthweights. I wouldn't use a SD on a SD heifer again to save my life. Some of the genetics have some big time BW back in there a ways. If you are wanting moderate - small cattle, they probably aren't for you. Jim Brown and Bollenbachs would be about the best herds that I'm aware of. There is one bull in ABS - Black Enuf - I actually bred his grand sire. If you are crossing them, I think they will out produce most anything. We still have some that are now mostly crossed with Red Angus and some Salers. I think if a person had a SDxSAxRA cow he would make a lot of money. Those are by far the most productive cows we've had.