Sassafras trees can get to be about 8-10 inches in diameter, 40-50ish feet tall, 30-40 ish years old, I'd guess. They spread. A lot. From the berries, which birds eat and then poop out, and they also pop up as suckers from the roots. They can become invasive. Somewhat similar to Autumn Olive, but less aggressive about it, I'd say. I don't think they offer anything to honeybees.
You can make sarsaparilla (root beer) from the roots. The wood burns quickly and smells like root beer. Dry twigs make great kindling because of the sap.