I absolutely agree about the Pfaff. I use the dual feed all of the time. It makes my piecing so much easier. When I switch machines I'll notice that my corners aren't matching just as I'd like. Then it dawns on me that I'm using the other machine and no dual feed.
The other advantage of the Pfaff, I can put the 1/4 inch foot on and still have dual feed. Man, do I sound like an advertisment or what? I do like the Pfaff! I admit it.
:P