Hi MAmom,
Welcome to the group. There are at least a few of us from Massachusetts, including me.
Both of my children attend the public school system. My experience has been overall positive so far, but it helps that we live in a strong school system. We have never tested our children, but DD14 is probably HG, and has some academic peers and is challenged in some classes. DS11 is stronger, has a difficult time finding academic peers. He is not challenged in any class so far, but we think that might change a bit after he enters junior high.
If you have detailed questions for me, fire away in a PM, and I will answer the best I can.