This foot has been a lifesaver! I've completed 16 flat sheets with hems much faster than any other way. My only complaint is that there is wiggle room. So there is a bit of drift as you sew. So if you want super crispy perfect seams this isn't the tool. But if you are OK with 90% perfect these a great bang for the buck. To be honest I will go into a store and buy a proper one because it does get annoying. And you do have to keep tightening down the adjustable part. Which is great so you can line up the stitching where you need it, but annoying because of it loosening. But at the end of the day it's made my job 90% better and for that it deserves the 4 stars