Some are pretty good, some will break if you look at them too hard.
This one:
Has lived in the brewery shop, getting used daily and getting the **** beat out of it on a regular basis, since we opened in '97. I'm so used to the rotating jaws I find it hard to do without.
I rebuilt it a year or so ago and added a thrust washer to the screw/jaw bearing area and tuned up the brake that locks the rotation in place when you tighten the vise. Much nicer now.
Too bad your is missing the pipe jaws. I use those damned near every day.