I, too, have the PC 4216 (4210 with the full set of templates). I find it does an excellent job for a fixed-spacing jig, and includes useful features that are absent on the other similar (essentially, copy-cat) jigs.
I prefer to keep the stock stable and tightly-clamped in the PC-style jig, as I feel that results in better accuracy, and better-fitting joinery. In other words, fewer chances for mis-alignments or other mishaps that will affect the joint. But, there are other folks who prefer to use table-oriented jigs. That's OK, since there's always more than one way to solve a problem.