I installed 3 saskatraz queens about a month ago. One hive had been queenless for a couple weeks, another I made queenless the day before the queens arrived, and the 3rd I made queenless just minutes before I installed the cage. I checked them all at 10 days. The hive that had been queenless for weeks still hadn't released the queen. I released her and she ran down between 2 frames and was accepted. The other 2 hives had released and accepted their queens. All 3 are doing well now.