I have an 2007 PFAFF 2056 with IDT - it literally has been 'on' since I have bought it. Pre-PFAFF I had a walking foot attachment - but it made my eyes buggy with the up/down action of the metal.
The IDT is so none noticeable - love, love, love it. But I think machine preferences are like coke vs. pepsi, cat vs. dog.
