I wanted to like this. I gave it several days.  I had good luck with narrow items, under 50 stitches, but for larger ones, the green ridges would pop up and the machine would jam, or the ending stitches would drop off.  Sometimes the whole item would fall off, and the tension was so high that I couldn't get the stitches back on the machine.  I tried counterweights on the edges, which only helped some of the time.  I did discover that I like machine knitting, when it works, but I returned this item.  Cheap, easily bending plastic just isn't going to function correctly.