I haven't worked with them either, but have heard consistently good reports from others (on these boards and others). I do know that small cottage manufacturers can go incognito for a short time due to vacations (backpacking!!!). It is more unusual for an organization the size of Zpacks, but not unheard of. Maybe reach out to there Facebook page to make sure your messages are getting through? Best of luck and keep this post up to date for others awareness.