Does it cut down on the amount of fraying?
Yes, quite a bit. At first I find teensy bits as they "fray" off the "pinked" edge, but that soon tapers off.
I would
not use this cutter to cut blocks for piecing....you can't get as accurate a cut as with the straight blade.
The reason I bought it in the first place was after attending a lecture by a professional quilter....sorry, don't remember her name....who used it to cut out flower petals for her 3-dimensional machine applique work. It just looked like a fun tool to have in the inventory. 8-)