What do you think about the book The Giving tree by Shel Silverstain?

I think it is about conditionless and everlasting love as portrayed by the tree for the boy whenever the boy needed something the tree would give it to him, Apples to sell, branches for a house, her trunk for a boat and finally when she was a stump she gave the now old boy a place to sit and rest. It also shows the true meaning of love. It also shows the bond of a mother and child almost with how the tree would play with the boy when he was young and when the boy got older he started to drift away from the tree and started to drift away from the tree to start his own life and at the end finally realizes the importance of the tree.