It is quite messy. Frankly I have no idea how it will hold up when I am done. But I have super soft fuzz all over my couch and anything I wear to work with it. It is however, SUPER soft and I love the feel of it.
I wish I had tricks to share, but I don't. The only advice I have is, dont' pull too tightly. I did a rectangle with it for a poncho, and when I was done, I was GENTLY tugging on the cast on row, to even it out and it snapped! It is not stretchy at all.