I've never used a walking foot, though I have them for most of my machines (including the "penguin" for the FW). I even have a Pfaff with the built in one.
I can get a king size quilt fully bound in about an hour. And once I sit down at the machine, I do not get up again until it's done. I've seen so many tutorials about joining the binding, and most make it so much more work than it needs to be. It's actually really simple, and the key is to press over the diagonal on the leading edge (I match the direction of the other seams).
However since I seem to let my quilts build up and then do 4-5 bindings at a time, that repetition helps to hard code how to do it in my brain. Its like most things, if you do just a little bit (like one quilt) and then don't get back to it for a long time, you forget a lot. However if you do a lot at one time, then you get the muscle memory and the next time (even if it's been 6 months or more) your body remembers quicker how to do the motions.
I'm watching one of Angela's craftsy classes right now, and not has encouraged by it as some of the other instructors. It is getting me more enthusiastic about doing more FM with my quilting. I started out with a machine without robotics, and even had the HQ for a year before adding them. But now that I have them, I'm more tempted to use them. Was not what I intended, and in truth they can take more time than doing FMQ if you want a more free flowing pattern. Much easier to plan your starts and stops, and make things fit without a lot of resizing and adjusting the design. Though your arms get much more tired doing FM than watching the machine move itself!