We lived in East Cobb until a little over 7 years ago, SC coast now. I actually grew up in E. Cobb from the time I was 14. Our daughter went to Mt. Bethel elementary, Dickerson middle and Walton high and I attended Walton.
Very good schools, some of the best in the ATL area. Transitioning from Walton to college was no issue for our daughter, she was well prepared both scholastically and in workload management.
Yes the traffic can be a PITA, but doing it once a week is tolerable. My wife had to drive to Coke HQ every day and that was another matter.