It is not without risks as is most things.
Back in 2019 after 3 or 4 months of looking online I found around 4 instances of people having major problems. Well, 3 1/2 as one was a, "my buddy had a friend that knew someone that had problems". 2 had top link bracket mount issues, the bracket broke at the bolts and the other was the back of the transmission where the bolts went in busted out, and 1 transmission broke in half. I did find one where the factory hoe frame mount that did break. Different brand tractors and the newest post was around 5 years old?
None of them mentioned what they were doing at the time, were they abusing the hoe to the max or was it just a factory defect.
The top link is the one that takes 90% of the beating.
Just doing normal digging and the like there shouldn't be a problem but if you're digging out tree stumps for example then that type of use could be an issue. When digging the roots if you have a good pull on the bucket and it suddenly releases then THAT is the most strain full part of it as the top link is absorbing that back and forth banging. If you do it slow and carefully it can be done safely.
Contrary to rumors your 3pt does NOT raise or lower the hoe, the lower links just link it -statically- to the hoe. So if you do have the a Draft control you have to make sure it's disabled.
I only had the JD-770 at the time and I ended up getting the
WoodMaxx 6600 series self contained one. The smallest they made and grey area if my tractor spec's made the min suggested. Pump and Hyd tank is built in. I was looking at quality to $$$.
For me it worked great. It can be a pain sometimes to attach, sometimes it only takes around 15 minutes and sometimes it takes almost a half hour. Just make sure to have a really flat area to park it. The
WoodMaxx was actually only around 100 ish pounds heavier then the OEM one was, and IF you found a used one they wanted almost as much as a new aftermarket one.
I did have to chain my back blade onto the front bucket of the 770 if I had to go to the other side of my property as it just bounced too much. I've used it to dig out stumps, moved large rocks, logs, brush, etc. Sometimes I was amazed how much it would pick up and sometimes I was amazed at how much it Didn't pick up. I also got the hyd thumb with it, OMG I love it. I did get my larger LS and it works fine with it, I can't pick any more up with it as the relief valve on the Hoe will still release the same but I can go to the other side of my property with out doing wheelies.