I like to rattle when I arrive, and right before I leave. Maybe once inbetween on a short hunt. Every buck I have sighted and I know for sure heard the antlers has responded. The unseen deer I dont know about. All the mature deer come right in, but usually try to circle. Immature deer sometime take their sweet time coming in for fear I believe. It is impreative that you are REALLY ready when you rattle. I have had them in my lap in just a few seconds!
Im sure there have been deer that didnt respond, but Im not sure they are sharp enough to get leary if they hear it more than once. Out side of November they seem to respond a little slower. Goodluck!