I used fiber fill in my puff quilt. Getting the amount of fiber fill correctly was a challenge but I discovered if I weighed each section I did pretty good. I have a scale that can weight very small amounts. This was the perfect way for me to get it right. I set the fiber fill on a plate and the digital scale picked up the smallest amount and surprised me half to death with the accuracy. Tacking it well is the most important part however. This is a beautiful quilt to do have fun with it.