Sorry, I mis-read your question...
Difficult? yes and no.
It was a little difficult to figure out the process, but once I did, it is very easy with a little guidance.
Those little curves with 1/4" bias were the trouble, but the fusible bias was a dream. Once it was ironed in place, just sew, sew, sew.
What you cant see in the pic is that the bias weaves over and under itself at each crossing.
Judy