I used the Creative Grid set of four templates (melon, arc, arc endcap and center 'diamond') in conjunction with Judy Niemeyer's 'Flowers for my Wedding Ring' for my daughter's wedding present. All the wedding ring sections went together VERY smoothly and I'm happy with the matching of points and intersections.
I was very happy that they were Creative Grid with regards to fabric gripping and am slowly changing out my rulers to Creative Grid.