I had always done FG without a template but LOVE Eleanor Burns FG templates.
Recently had to do FG around borders of three quilts for brothers (they had to be the same, no fighting).
So after about fifty, I looked in Eleanor Burns Flying geese book for her method without templates and liked it so much I decided to buy her templates.
Have since made FG quilt and no longer mind making them and I always have a perfect 1/4" all the way around.
If you don't make FG often, or they don't turn out as consistantly as you like, buy the templates. She makes it easy as always.