I love Flower Soft. I used it below as an "autumn" base around the tree. I mostly use it to enhance floral or landscaping embellishments. I've also used it as a lion's mane. I bought some white FS to use on a snowman, but haven't gotten around to that project yet.
I find it easy to use, but a bit messy. Fluff up the flower soft, put liquid adhesive where you want the FS to be, and then dump lots of FS on top of the adhesive. I pat mine down, and then I shake off the excess after it's dry.