They have been installed and are working quite well.
Nothing wrong with the idea or the quality. Put them on a pair of HIghland Chukkas to expand the lacing width. Didn’t help with that very much and after adjusting the lacing 3-4 times because they were slipping around, decided not to wait until they broke in and formed lacing grooves to better hold them in place.
They work. They are inexpensive. They look great and are stylish. I have them on all 5 pairs of my boots. Buy with confidence.