I had gotten one, but ended up tossing it. The fabric kept binding up on the 'belt loops' and my iron is the type that has an auto shut off on it and I had to constantly keep picking up the iron to wake it up.
It was quicker to fold and iron the binding fabric without it. Also, it was more accurate to do the fold and iron the regular way. I make queen and king sized quilts and have very long bindings, and honestly, the binding maker was just a pain to fiddle with.
If you would like to get something for your Aunt, quilters can always use gift certificates for their favorite fabric store!