Bests & Worsts Reviews from Amazon

Absolutely AWFUL! As someone who has been sewing for 20+ years I know how to work with any fabric and how to use this presser foot. Yes it cuts. But it doesn't cut it close enough to the edge to make it useful nor does it cut straight. You cant keep an even edge because of the way the fabric feeds into the cutting mechanism, it ruffles the edge on knits even when you treat them properly, and as this is supposed to mimic a serged edge it does the compete opposite. Instead : Go ahead and get a rotary cutter (for easy of clean cutting edge) and an overcast foot, and use a wide double overlock stitch or any wide stretch stitch (suggestions in yellow, best in red in picture). Be sure to cut the edge RIGHT before you sew the edge right after you trim it to desired width. This will work on knits as well as wovens etc. I also find it helpful to test this on a scrap of your fabric and play with the thread tension until it's where you like. Be sure to use the overlock foot as it keeps the edge flat when using this stitch. Without this foot (using a standard or universal foot) it will curl the edge under and make it super uneven and unfinished. If this happens, try lossening the tension. Here's a good overlock foot: https://www.amazon.com/Singer-SHOMHNK004-Overcast-Foot-HP30244/dp/B002F03QQ8