Well if you asked me back in 2001, I could have helped ya out. I was stationed there for 4 years.
Harker Heights was an OK area as well as living out in Copperas Cove. The traffic kinda sucked coming down 190 from CC to the main gate. There were some nice apatraments on the east side of Killen by the park and I used to live in an apartament complex just behind the Killen mall. It was a good location.
But like any area, things change over time so I'm not too sure now.