Hand waving!
I am another Bernina 440 owner. Love it. Hubby got it for me for Christmas about 5 years ago. I wanted it specifically to use the Bernina Stitch Regulator; without it, I NEVER would have even attempted to do free motion quilting. The BSR takes a lot of practice, so don't be put off when your first attempts don't look like something in the Houston Quilt Show.
The 440 doesn't do windows, but that is my only complaint.
Enjoy your new machine and the family who loves you enough to give it to you.