I very much value mine -although I wouldn't buy that brand/style again.
I have the TopLine brand. It is a PIA to install on the Taco (not so bad if you have just a steel tailgate) since it fastens to the tailgate instead of the sides of the box. It is easily removable even w/ the tailgate closed -unless you put the hinge pins in from the outside, which means it's easily stolen. (To prevent expansion/contraction prblms, and to deal with the non-flat steel behind the tailgate liner, I drilled 1" holes thru the liner, then installed shims and spacers so the bracket would clamp to the steel structure, and allow the plastc liner to slide underneath it -avoiding buckling. A lot of extra work over just drilling 6 holes and installing screws, as you do w/ the Westin.)
The type made/sold by Westin (and Toy) are functionally as good or better, more easily installed, and with a tailgate lock, less easily stolen.
But functionally, they're almost the same (though the Westin is good for holding pkgs againstthe tailgate when closed). I probably only use it 4 times a year to extend the bed -but it is extremely handy. The only advantage of the Topline is that it folds fairly flat against the tailgate, not using much cargo space when it is not being used to hold something.