I don't have any experience with Pfaff, but I do have the 830 and l love the machine. The on line classes are pretty good and I have had good support from my dealer. There are all levels of projects on the Bernina web page. I made a simple project on the machine at the Houston show and it sold me on the machine. I find it easy to use. Good luck - I'm sure you will enjoy either machine.
Donna