I got and have used the HF quick hitch (and got the bushings from EBay) and by using a coupon on a sale item at HF,I got their QH at enough of a discount compared with PEC and all the other QH's out there (JD, Speedco, etc.) that it would easily pay for any and all modifications you could ever need, (which BTW, I haven't needed for anything except my Kubota branded ballast box, which was ironically "guaranteed" to be "fully QH compatible" by my dealer).
I also have the swinging toplink connector from both HF and AgrSupply (less expensive there) and use one of them most of the time.
The build quality of my HF appears to be comparable to all the examples I have seen at the dealers round here (see above).
It's like car brands, football teams, home towns, etc., everyone has their favorite, and they're all for different reasons and because of different experiences, sometimes with the same piece of equipment.
For me, it was the experiences of trying to get my lift arms adjusted to take ff and put on implements with narrow tolerances, in awkward positions, and trying to turn stiff (though greasy) turnbuckles to move them.
BTW, the telescopic lift arm stabilizers are awesome, and if they were less $$, I might have gotten them instead of a QH, but since I have the QH, they are less important for me right now, though I will probably get a pair eventually.
Thomas