Well I am finally building my own workbench and have the lower part glued up. I am considering using a Shoulder vise on the end of the bench and I am wondering if anyone here has used the Lie-Nielsen shoulder vise  found here:

http://www.lie-nielsen.com/catalog.php?sku=chain

I am particularly interested in any problems you may have encountered and the overhang distance on the end of the table to allow the screw to clear the leg assembly.