As others have said, this seems like a good, durable, inexpensive set of jack stands.
The only thing I would note is the very top of the jackstand. I've used others that have more of a flat top, which I prefer. These stands have a notch that fits the rim on the bottom of your car where most people place jackstands during use. If that sounds confusing, just look under your car, or in your car's owner's manual for directions on where to place jackstands. You'll see what I'm referring to.
What I dislike with this product, however, is not the notch itself, but the way the rest of the top angles up and away from the notch, like a big "V". On my car, this is a problem. Because of the sharp angle of the top of this jack, it hits a cross bar before the rim of my car is fully seated in the notch of the jack. As a result, I have to place the jack a little more towards the middle of the car than I would like. Not a big deal, but if the jack had a more flat top, this wouldn't be a problem.