I called almost everyone from a-z and they were either too busy to come for an estimate (within a week) or too busy to come and cut the tree (within 4 weeks). The Stouffville Tree Service guys are insured, but they aren't arborists. They are also substantially cheaper, efficient, and honest. Told me that they would come Monday morning and I woke up this morning to a tree that was being cut down. Our Silver Maple was loved, but sick, rotting from the inside, and structurally unsound... I was worried about how it would come down since it seemed all tangled with the another tree, but they did a great job.