I have a GC1710TLB with a HF Quick Hitch. So far I've had to drill out the toplink and the lower lift arm holes to proper sizing for cat1, replace the pins to proper size (all to eliminate slop when pulling my box blade). I've also replaced the hook for the toplink. All told ive got about $170 into making it right. Every set of bushings for the implement is $20-$25 a pair.
Do yourself a favor and buy the Speeco Economy from above. Costs a bit more up front but it'll be right and save you money on bushings.
Have to disagree on the Cat 1 QHs. The Speeco Economy Hitch is a good one, for sure, but it's nearly three times the price of the HF QH, if you buy the latter with a coupon. Yet both are well made, and with all the HF hitches in use by TBN members, I just haven't seen reports of product failure. Also haven't previously heard of anyone having to drill out the hole in the bracket where the top link attaches. I have three of them, and my Cat 1 top link pins fit perfectly. The only mod I think is really worthwhile on the HF hitch is to swap out the top hook for one that sits further out beyond its bracket. Here's a good one, although I see the price has gone up to $25 recently:
https://qualityfarmsupply.com/product/HITCH-ampersand-LINKAGE/QUICK-HITCHES/Quick-Hitch-Repair-Parts/873-dash-HF141137
You can swap out the top hook and still be way ahead on price.
Also, correct me if I'm wrong, but I'm pretty sure that the lower link hooks on the Speeco Cat 1 hitch have an inner radius that will only fit the 7/8" diameter of a Cat 1 pin. That's a big negative in my book, because it can't be used with this popular type of Cat 1 adaptor, which I like for easier hook-ups on several of my implements that don't use a clevis-style link pin setup:
Bushing Kit-Quick Hitch Bushings | Agri Supply 77869
The current model of the HF QH has lower link hooks that are sized to fit those bushings. If you want to use them with the standard Cat 1 pins, just cut some DIY bushings from 1" I.D. galvanized pipe, or pick up the tube-style Cat. 1-2 bushings at a farm supply store for just a few bucks. I much prefer the flexibility that the larger inner hook radius allows.
Interestingly, the earlier model of the HF QH from several years ago had lower hooks with the smaller internal radius like the Speeco.
My experience with the HF QH has been very good. I have three of them, one on each of my loader tractors. The oldest one is 16 years old, yet for the last six years it's been on my 2014 NX4510HST Cab, pulling a 750 lb Woods BSM-84 box blade and a 550 lb Woods HBL84-2 rear blade. I do a lot of heavy grading, and I haven't seen any sign of metal fatigue or weld failure on any of the QHs so far.