My experience is with two old beat-up ones so I hope your new one works smoother than mine.
If you play around with the pins trying to lower it faster than notch by notch, not much will happen then unexpectedly the carriage will fall all the way down. Keep fingers and toes clear.
Also there are modes where the handle can kick so keep clear of the handle and mast as much as possible.
I found a chunk of paraffin was the best thing for lubing it since that won't attract dust or make it slippery to handle.
30 years ago when I spent every weekend crashing around the woods in an old Willys Wagon, I frequently used the HiLift jack to get out of ruts if I was hopelessly high centered in some bigger vehicle's ruts. I would put the jack under my trailer hitch and jack it to the top, then tip the jack to let the vehicle fall and land a foot or so to one side of where it got stuck. Getting the rear axle on solid ground was usually sufficient but there were times when I repeated the process lifting the middle of the front bumper also. For a modern vehicle you better examine the front bumper to see if it will stand up to this abuse.
Don't replace the handle with a stronger one. It is sized to bend as a warning of excessive force.
I take mine completely apart every several years to grind and polish the little ramps that the roll pins have to slide on since binding there is the most common problem. Also the larger pins have to slide easily under presure of the springs.
HiLift jacks are great. I can't think of anything better for lifting a tractor axle.