I have mine set up but the majority of the birds prefer to sit on top of it. They will literally pile on top of each other trying to stay on it lol!! It works though and it's pretty funny to watch.
But we don't sit them ON the heating pad. We bend a bit of wire into a frame, put the heating pad on it, then put a towel on that. That forms a cave. They duck in and out just exactly like they would under a broody hen. Temps under the pad don't need to be at that "95 the first week, 90 the second week, 85 the third week, etc" and temps under mine the one and only time I ever tested it in response to a question it was 82.9 under the pad, and the room was 69 degrees. The chicks had already been under it for days before I even tested and were absolutely thriving. When they get bigger or need less heat, you just bend the frame upward a bit or turn down the pad. This video starts out dark on purpose....the first day after we brought them home they already understood the difference between night and day.