Purchased my first Hi Lift in the 70's for my FJ55, they have been around a long time. And much smoother than a Reese Farm Jack which is best left to pulling and tightening fences IMO. Used the heck out of it when I was out pushing things to the limit. But as I get older and hopefully wiser find that I need it less and less. However every once in a while it still comes in handy. I will use the OEM jack if possible but there are times when your in deep water or mud it just don't cut it and the hi lift comes out. They can be dangerous as noted and you have to be aware of what your doing.
Agree with the come a long too, between the Hi lift and Wyeth Scott more power puller I feel comfortable in any situation. I've never wanted to go deeper into anything I've been stuck in and usually want to go back the other way. A PTO winch or even electric winch doesn't do any good when your in water up to the top of the doors. Damn beavers. You can also use the hi lift as a come a long although it is a very short pull distance wise but good for use in tandem with the come a long and overcoming the first initial rolling resistance by starting with the hi lift then switch to the come a long.
I've had several over the years and lent them out to never be seen again. I keep mine under the storage platform in the access cab next to the OEM jack.
You have to keep them clean and lubed. If you don't it will be locked up when you need it most.