Here she is in action. Basically, the foot takes your bias tape, wraps it around your fabric and perfectly edgestitches it. Every time. All 6 yards (!) of it.
Isn't that nice? It looks exactly the same on the back, which is my favorite part. Since the foot itself folds the tape, the wrong side doesn't have that hanging over bit, but you don't have to worry about missing the edge on the wrong side either. This was particularly critical for this project, since both wrong and right sides show on the flounces.
Here's a purty pile of freshly bound flounce. The other big bonus of the binding foot - it only took me about 45 minutes to do all of this binding, and it seriously was about 6 1/2 yards worth. If I had done that by hand, it would have taken days! I love gadgets!!