How much do we like Pat's Quick Hitch? We've bought three sets of 'em, for three different tractors. That alone is a very convincing argument for what we think of Pat's Quick Hitch.
With these quick hitches, I no longer put off swapping implements - a couple of minutes, and no sweating, no swearing, and we're good to go.
Like others here, we'd also tried the U-framed rigid quick hitch and found those too much trouble (modding implements).
The factory has also been great to work with - we needed some longer pins because we have sway bars and they had exactly what we wanted and shipped them immediately. Plus, this is an American-designed and -made product!!!
BTW, I highly recommend getting sway bars if your tractor has mounting bosses. I made one side adjustable (welded in a top link) and it lets me match up implements very easily - I don't have to use the spreader bar. Plus, things like box blades and bush hogs don't bang back & forth anymore.