Hubs and i used together for long time and then cleaned up together. He took suboxone route and i did methadone detox. Taken slowly it was painless on both (about 18mths in our case).
Not advocating long detoxes. I am simply telling my experience that it doesnt have to be feared and doesnt have to be painful. I have also done short detoxes in the past that were pretty disgusting but appropriate for me at the time.