I have used Hobbs 80/20 both the fusible and non- fusible. I did not think the fusible was very good , it did not stay fused very well. The weight of the quilt would pull apart the layers as I was repositioning. the fusible did NOT accomplish what I was looking for ... no pins... smooth front and back ... I was really dissapointed. It might work for small projects like a table runner.
Plus you can not preshrink the fusible... a drawback for those projects I wanted it to stay flat/smooth with out the puckering of an antique quilt.
When I use the regular Hobbs 80/20 i use with spray basting and have very good results.