I have been living in Great Falls for the last 11 years and I will tell you the most useful information that I got when I arrived, new to Malmstrom 11 years ago. Stay out of the low number streets and Ave #'s. The main portion of town is set up on a grid and the low number addresses are in the center of town and that is where the lower quality housing is. Great Falls really does not have any unsafe areas. The most common thing your get is vandalism. There are lots of nice neighborhoods. There are good listings available at the base housing office. I wish him good luck and hope he enjoys his assignment. My husband and I liked it so much we stayed once we retired.