I have a Pfaff and the IDT is AWESOME! You just drop your needle and go! Most of the time I don't even have to change the foot I'm using, let alone the hassle of removing the shaft and fussing with the parts of the usual walking foot! My machine is the quilters expression 4.0 and it's pretty big heavy to tote to the shop. I know they just came out with a new PFaff that is smaller and simplified. I'm not sure about the IDT though.