What a fantastic bit of kit! It was included with the machine, as the individual prices for them eye-watering. (£110) However, it is a heavy, well engineered foot and hardly makes a sound. What I really, really like is that fact that it has 3 soles, including a 'stitch in the ditch' or 'edge' foot. The piece of metal that makes it ride along the ditch is pretty solid, and has a hefty spring at the side of it which keeps it firmly in place, and it just doesn't move out of the ditch. The comparison with that which came with the hated Juki is beyond belief. The Juki foot is still £50 tho! The Bernina foot is more than twice the price, but is certainly more than twice the quality!. Even the little screwdriver used to change the soles is excellent!
It has fast become my favourite foot!