Yes, good i dea, as a caring seller, i like to know people have recieved items promptly,Maybe take it 1 step further where its calculated where it works in favour for us casual sellers "average days\delivery", might help us get sales, as there are some dogdy people out there with low FB scores, Which im sure is off puting to some buyers, ATleast people would know even as a casual seller your still a trusted person.