I have the 24" model, and it's pretty good. One thing to note - the
handle to tighten the clamp is fairly small and metal - not very
ergonomic, and kind of hard to put a lot of pressure on it. Also, this
handle moves depending on the size of your material, and seems to end
up in an inconvenient spot. Their "Boomer Red" model, or equivalent
ones at Rockler or Amazon, have handles that look better to me.
Overall, though, it's a unique clamp design that is a good straightedge
for routing a groove, etc.