I bought one thinking that it would be easier to use than my pinking shears for cutting around the curves of arm holes, necks, and crotch when cutting out the pattern. By doing so, I thought that I could eliminate the trimming step after sewing the curved seam. I found that I still need to cut the pattern using the straight rotary but I do use the pinking one for the trimming. It is easier to use that the pinking shears. I do not use the pinking rotary for quilting.