I tried the Pinmoors at a guild workshop & thought it might be fun to pick some up since supposedly straight pins give a slightly smoother surface than the curved safety pins. Unfortunately, at $40/100, it was prohibitively expensive. I use around 600 pins per quilt, which would be a $240 investment just for the Pinmoors. I'm sticking to Size 2 curved safety pins for now & will use that $240 to make a quilt or two.