I had to replace one yesterday due to attitude. I had worked bees all day and they all were fine. When I came to this hive, as soon as I cracked the lid they were all over me. All in all I don't see that they are any better than most. I made 210 nuc's 17 days ago with Sam Comfort queens. Out of 210 only three were not accepted, and I had to pull brood from 4 already because they were packed full of brood. I started with two drawn frames and three foundation. Granted new nuc's are different than overwintered double deeps, but I worked the nuc's in a t shirt and no veil.