The walking foot was the best purchase I ever made. I have a Pfaff Varimatic 6085, yeah I know it's old. Absolutely love the walking foot. It is a tad tricky putting it on, but I bought a screwdriver from Clotilde, short stubby thing and it works wonders for attaching the foot. I tried something the other day without the foot and had to take out the seams because it shifted. Won't make that mistake again.