I don't agree with Olver on just about everything, but he has my respect -- he answers all emails seemingly personally, he keeps his "constituents" informed on what he's doing via email if you opt in, and he discontinued his practice of "franking" through the US mail at taxpayer's expense where the protest got loud enough. At least we know where he stands, unlike Jenifer Flanagan.
Congrats on getting a response.
I called both senators and my rep once about an issue.
Kennedy's staffer, once he found out it was a pro 2A call, shunted me into voice mail Siberia without listening to my feedback.
At least Kerry's office (seemingly) wrote my information and complaint down.
John Olver's office was the only one who responded. (With a letter explaining why my point of view was wrong)
I knew I wasn't going to get a positive response from any of these guys, but the experience with Kennedy's office was instructive. It takes a special kind of arrogance to blow off a constituent like that.