I recently purchased this one off amazon for $34.00 (3 ton & 21 inches tall)
https://www.amazon.com/dp/B003ULZGFU/?tag=wranglerorg-20
We are always setting ride height and locking the frame down to the concrete to keep it from moving around while we work on it. As such, we are always making small adjustments to level the frame and get the height even on both sides.
That jack and stand appeals to us since at first glance it appears it would make that pretty easy but the stops are not small enough in adjustment to actually do what we need very well so that kills that part of it. As for the rest, I would never use them because it would put us too much under the rig when lifting it. I don't want to be anywhere near under the rig or close to it when lifting it, I don't want to be on my hands and knees either. It is much harder to scramble out of the way from that position than it is standing up.
I realize that comes across a bit paranoid but it isn't in the least. I have had two incidents that make me feel that way, fortunately neither caused any damage other than to my pride.
The first was we had a rig up on drive on ramps to do a trans swap. I got finished and was bolting in the rear driveshaft. Doing it by myself, I had the t-case in neutral so I could spin the shaft to line it up in the pinion yoke. Got it line up and was tightening the last u-joint strap. I had the wrench angled wrong which turned the pinion and started the rig forward and down off of the drive on ramps with me under the rig. Not being a complete idiot, (as in just dumb enough to forget the parking brake or wheel chocks on the front tires) as the rear axle started to go over me, I reached up and gave it a big ole hug and hung on for the ride after swinging my legs to the middle of the rig so they wouldn't get run over. The wire fence with jasmine on it at the end of the driveway stopped the rig with me still holding on due to only a very slight slope.
Fast forward a year later and I have the same rig in the same spot facing the same way building all new suspension under and I have it on 8 jack stands. Doing the leveling thing again, I jacked up the front of the frame 3/8" to put a 1/4" shim on top of that jack stand. As soon as it moved from 5/16" to 3/8", the rig tipped forward and fell off of all 8 stands with no frame brackets for the control arms on the frame so the frame wound up sitting flat on the concrete.
In the process, it almost flopped over on it's side. As it was tipping all the jack stands forward, the jack I was using didn't move so it wound up directly under the oil pan right behind the harmonic balancer and tipped the rig over to the side just about going over until it slipped off the jack and let the rig fall back flat.
I now have 8 big D ring trailer tie downs bolted to the concrete and we do not get under a rig until it is strapped down to the concrete and can't possible tip over. Be safe, be aware, and know if it can go wrong, it will. I'm lucky to have not even gotten a scratch twice. I should have learned the first time. Don't be like me.