I have the Quilt Expression 4.2. I absolutely adore this machine and have quilted many quilts, both SID and FMQ. The quilting foot that comes with the machine is a "hopping" foot of sorts. It only presses down on the sandwich when the needle comes down, and you must lock the presser foot lever in the half-way position or your thread tension will not set. The Pfaff foot is quite fragile (at least in my hands) and replacements are expensive so I switched to a universal hopping foot. I've been through a couple of them too, but they are less than half the price of the Pfaff foot. I find the universal foot is also sturdier and works just as well.
Do you have a Pfaff dealer nearby? They should be able to show you how it works for little or no cost.
Last edited by ShirlinAZ; 04-26-2016 at 09:41 AM.