I've never lived there, but I used to live in the condos next to it (Stonecroft). I think the area is pretty good, certainly better than stringfellow and 50.
They beat Shenandoah Crossing over at apartmentratings.com
http://www.apartmentratings.com/rate/VA-Fairfax-Autumn-Woods.html
http://www.apartmentratings.com/rate/VA-Fairfax-Shenandoah-Crossing.html