My withdrawals, every time I went through them (before I was truly ready to quit with the support of my family, and the addiction clinic here) lasted a lot more than 3 days.
:(
Part of me wishes I had been locked in a room and dealt with it. But the other part of me knows that Suboxone gave me the band-aid to let me heal the other problems in my life, to tackle my addiction in full -- to deal with my depression, to get a stable job and place of residence, etc. etc.
And it worked for me. It doesn't work for everyone. I'm tapering now, and it's not too bad thankfully. I'm lucky in that regard.