I used mine today to straighten the chassis of a spike harrow that I had left in tall weeds, and then backed into with the mower. I got the harrow back to perfectly straight.
But ... I avoided the HiLift's couple of attempts to maim me. I've used it infrequently for 40+ years, and thought I knew all the hazards. Wrong. I learned by a painfully pinched knuckle that the up/down release doesn't have any room at the end of its travel. I was working horizontal and reached under to release that lever where I couldn't see the lever. The lever jumped strongly to the far end of its travel - where there was no space for my knuckle so I got hit. I thought my thumb's knuckle was broken but now hours later it feels ok. That could have been worse. Why in the world doesn't that up/down lever have any space at the release end of its travel. Remedying a pinch point there could be designed easily.
I never bring out the HiLift until its the very last alternative. I've had it fall unexpectedly too many times when I expected to crank it down. Never injured but maybe some time I won't correctly anticipate all the things that can go wrong. The comparison to the hazards of a chainsaw is a reasonable comparison.
Don't buy one until you have some need that can't be resolved by anything else. If you do buy one, pay more for the forged version. Their cheap stamped one, and clones from HF etc, are likely even more dangerous than the original.