We cruised the Destiny back in November. My two sons at the time were 2 and 5.
Those youth counselors were absolutely wonderful with my children. They kept them entertained, safe, and had fun. Those girls never get any credit for the excellent work they do. We used them mostly at night and here or there. We tipped them $200. at the end of the cruise. It was well deserved, most people don't tip. As for the way my husband and I felt, they helped make our family vacation, especially on the formal nights.