I think they are great. My only reservation was putting it on my machine. I didn't want to ruin the finish on my Bernina and I use Featherweights and didn't want to mark up the finish on them either. So I went to my plastics store and bought a tall cube 2 1/4 x 2 1/4 x 6 1/4 and filled it with glass marbles so I move the light from machine to machine. Did everyone attach it to their machine?