I have a Pfaff 2144 with IDT. I keep it enggaged at all times and it is problem free. I love it for piecing and quilting! However, I bought the machine for that feature and for the thread cutter thinking that would give my finished piecing less "clean-up" of threads etc. I has never worked! Well I should say the cutter works but then you have to open up the bobbin case and manually pulll the thread up. What a bother! I think my machine is cursed because I've had it into the repair shop so many times. It is in love with the repair guy- - - having a torrid affair! It needs to go in again but I am always using it so I hate to be without it. Doesn't Bernina have something similar to IDT?