I have used small numbers of queens (4 to 8) from 6 different queen breeders. They have been different types of queens NWC, Russian, Russian hybrid, Survivor, and Italian. About half have been good productive queens that built up quickly and produced some honey. The others build up slow and never amount to much. The exception are the cordovan italians which all build big colonies. What percentage of the queens you purchase are good or excellent quality?