That does depend on where they land first.
If they landed in New York City, they would not know what to think. Everything would be completely alien to them, and it is up to specultation whether they would try to befriend us and explore this new land or leave the strange world they had found.
Depending on where they went, the result would be different. In some cases, they might even be disgusted with the putrid, thick factory air and dirty lifestyles of some, or interested in the quaint nature filled life of some cultures.
I ... can only wonder.
