before you buy, drive the route between prospective and necessary during runs hours.
the direction you mention is not bad the other direction is hell. ie am laural to greenbelt, pm greenbelt to laural.
there are no socially redeeming features in greenbelt. to get to decent restaurants, you must to to montgomery county, or dc. for a few activities, UMD in college park has started with the smith thing. UMD does of course have athelitic events.