Have you visited their site? My info is mostly all second hand, but I believe Kona Queens was originally started by the Weavers. It was one way they were planning to avoid AHB genes becoming a problem in their queen rearing operations. There are very strict import laws in effect in Hawaii. At some point, they sold off Kona Queens and have continued their operations in Texas, trying to flood their area with EHB drones to minimize exposure. I haven't heard anything negative about Kona Queens. I have read speculation that the Weavers are having some problems with their Buckfast line becoming hot in second generation crosses. But I can't give first hand info on this either. Guess it gives more weight to annual requeening, which has been a good policy for a long time.
http://www.konaqueen.com/