I'm only speaking from experience regarding what I felt when I took the wafer.

Years ago I didn't feel anything, but over the years I've become more sensitive to things and how it makes me feel. Although I have not participated in the church for a very long time, I remember a sense of peace and calm after receiving the sacramental bread. There was nothing satanic about it - only healing. I'm guessing that transubstantiation is just a gift from the Holy Spirit that descends down to the priest and goes to the wafers to bless it.

Just my experience.