JoJo - you'll love it when you finally get it. It's really versatile. Ask the dealer to show you ALL the other things you can do with it. Someone in the store is bound to know - otherwise ask about it here, and we'll start describing! I'm half asleep right now, or I'd do it.
My favorite, besides SID, is to join leftover pieces of batting. Use the faggoting stitch - I think that's actually what the foot was designed to do - it's called an 'edge-joining foot.' When you join batting pieces with this stitch, it really doesn't show when the quilt is quilted. Much faster than whipping them together by hand.