I use fusible batting all the time. I love it. I iron the heck out of the quilt, first on one side, flip it over and iron again, straightening out any bumps or wrinkles. Someone once told me not to use steam, but I find that using steam helps it stick really well.

I didn't have a problem with a regular hot iron but I did have a problem with my little travel iron that I use in my sewing room.

I learn so much on this site.