I bought an HF jack, mail order because there was no common internet then, and used it for 20 years... Gave it to a neighbor about 10 years ago and he says it still works fine.
I recommend jack pads/block.... Seen to much jack on sheet metal/panel/brakeline/exchaust damage from clueless neighbors trying to act like a mechanic. Know where you will put the stand, and where to jack, prior to starting the job. Just use the search words, jack pad, in amazon.com for info, make or find some locally.
Might have to add some hydraulic oil(or PSF/ATF) every now and then. Consider doing it now since some will be low when even new. HF also has hydraulic jack oil in little bottles.
https://www.harborfreight.com/15-oz-hydraulic-and-jack-oil-40709.html
Give it a leak test. Jack up vehicle, and leave it overnight. If it fails the simple leak test, swap it out. My hydraulic jacks can hold pressure pretty much forever. My Walmart jack slowly dropped in < 30 minutes.
Always use jack stands. My stands are too old to worry about and better than anything I've seen at walmart/HF/autopartstores. I always thought that those recalled stands had too much wobble and were too loose when new. I am pretty sure they ironed out their bugs by now.
Like any ramp, jack, or stand, you should always be on a 'proper' surface. I see too many destroyed on lawn/gravel/mud especially those plastic ramps, and too many motorcycles in the dirt. Use common sense.
When working on my car in the driveway, if vehicle is up on a jackstand, the hydraulic jack is there waiting to catch the vehicle if the stand quits for whatever reason. I could have my car up on 2 stands and my hydraulic jack follows me around on whatever brakes/suspension I am working on. And, I don't put my 'noggin in between the ground and frame rail when the luvin' wife is around.
The company recalled their three- and six-ton jack stands in May and is now recalling the three-ton jack stands that were replacements for the original recall.
www.caranddriver.com