I’m writing this review because I greatly value them and for almost everything I purchase online I scour the reviews to help me make my choices.I bought this for my 20+ year old kenmore sewing machine. I was pretty worried it wouldn’t fit, but surprisingly it works very well. As you can see in the photos there are some gaps but it fits snugly enough around the arm that It is secure and the gaps don’t really matter. Assembly was easy enough : just screwing in the legs. My table surface to the left slopes down a touch but the legs were easily adjusted to make the surface level. The feet have rubber bottoms to prevent motion or slipping. The plastic top is smooth and sturdy and nothing wobbles or vibrates. It greatly extends my sewing surface for quilts or large pieces of fabric.I chose this brand based on reviews that other cheaper brands/styles were flimsy and vibrated.This was worth the extra money! I am a happy customer!