At first glance I liked it. Might solve a problem I have - I love the 1/4" foot but I can't use a single hole plate because I have to move my needle position to get a scan 1/4". This doohickey would give me an "extended" 1/4" guide and I can keep my needle centered with a single hole plate. Plus, my husband has something in his shop that is very similar that I could use cheaply!
Then I noticed something ... this thing is long. Quite long. And to work it will need to be adhered to the base of the machine.
RIGHT OVER THE TOP OF THE BOBBIN COVER!!! (At least on both of my machines)
DOH!!!