BUYER BEWARE!!!I have one and I own 2 Pfaffs it is such a disappointment. I watched the demo at a quilt show and was so impressed until.... The claim is that it will fit any machine- for some Berninas you have to buy an extra adapter. Well as it turns out, to make it work on one of my machines you have to remove part of the foot assembly every time you want to use it and on one older machine it rides so low after trying and trying all the adapters and emailing the curve people you can barely get the fabric under the feed dogs- have to drop them and wiggle. The curve people were basically of the mind that you bought it and it is a pain to install or get to work - too bad.
SO be very cautious- mine is a waste all around- for my specific machines. Anyone want to buy mine? Make me an offer.