I just bought one but won't be needing to use it for a while yet. I wanted to have it here ready when I needed it

I bought one in Paducah several years ago and it does work. As with Terryl's friend, Marci--after the first couple blocks it is easy.

I saw a lady on Simply Quilts years ago that uses her regular 1/4" foot the same way the Curvemaster works. Hold top piece in left hand--bottom in right and keep edges of them both just touching the guide on the 1/4" foot. She also made sure the outside curve is on bottom and inside curve is on the top as it is stretchier so you can pull if needed. She called them pie & ice cream. Pie is the partial circle and the ice cream goes on top.

The lady at Paducah that was selling them the year I bought mine was using it to piece Dresden Plates. She was sewing the blades onto the background fabric & then sewing the blades together. Fascinating to watch her.

I believe the Curvemaster is also a 1/4" foot and it comes with the adapters for most brands of sewing machines so you get 2 feet for the price of one.

Thanks for all the help. Haven't decided yet but knowing the gadgetaholic in me I won't be able to resist. LOL