How does the new line of Rocklers Sure Foot Bar Clamps
http://www.rockler.com/ecom7/product...&filter=clamps
compare to the Bessey or Jorgensen equivalent.

One definite advantage that I see is the ability to extend the length
easily.

However I also know that the Besseys are considered the best (and that
Lee Valley has them on sale). Does anyone have personal experience
with the Rocklers?
Thanks in advance.