I have never used Minky but was considering using it as a back for a baby quilt. Since reading these post though I know I will never use it. That is unless Minky is improved. Sounds like more than I could handle.
A big concern I would have is, what does it do to the sewing machine. More than likely the bobbin casing has to be cleaned thoroughly. Don't think it's worth it. Think I will use flannel for the back instead of Minky.