Thanks for the post! I am glad I am not the only one that saw this on Amazon!
I use mine for my table saw. Got it cheap at Amazon a couple of months ago.
I leave mine in the fully extended position (I cut a lot of long, thin pieces to length), and mounted a fence face on it. I also applied 100 grit sandpaper to the fence face to control the lumber, and keep it from moving when it contacts the blade (has a tendency to pull forward just a tad when the wood makes contact with the blade). I used PSA sandpaper, and it worked great.
Excellent miter gauge, great price (at least when I bought it).