Considering these stands cost about four times as much as a lot of others, and considering the five star reviews, I was expecting perfection.  Unfortunately, they have design flaws.First, the packing sucks.  Two stands come packed together in one box with bits of cardboard that are supposed to prevent the two stands and the two separated stand arms from rubbing together.  I'm not sure if they scraped through the cardboard or if it just shifted, but all of my stands have scrapes on them and in one place the metal is rusting where the paint was scraped.  The manual says if you see rust to scrape it off and repaint it.  I shouldn't have to do that when they're new due to bad packing.  Also, the scrapes reveal just how imperceptibly thin the paint actually is.The description says "Formed base adds stability and helps reduce sinkage into pavement".  When I think "formed base" I think formed as one solid piece.  Instead, the base has tiny triangles of metal welded to the _inside_ of each foot.  Then they carefully take a picture of the stand so you can't see what they did till you get it.  That would still be acceptable except they made no effort to level either the feet or the triangles.  On many of the feet, the triangle sits too deep in the foot so it wouldn't even touch the pavement until the foot edge had dug into the pavement.  In other cases, an edge of a crooked triangle will form a divot in the pavement before the rest of the foot or triangle touches ground.  They could have splurged for a tiny bit more metal to make the triangles large enough to rest the edge of each foot on the triangle, then set the whole thing on a flat surface while the triangles were welded.  I've seen other stands with that design.One of the other reviewers mentioned that the arm that locks the stands at a particular height doesn't move very far and so it's hard to tell by looking if the lock is engaged.  I agree this is a problem and I wish the teeth were deeper so it was easier to tell when a locking arm was fully engaged.  However, it's probably not really an issue because the weight of the yellow bar and the shape of the teeth and locking bar will force the locking bar to fully engage.  Even if the locking bar is rusty enough to prevent the weight of the yellow bar from fully locking it, the weight of the car certainly will.  I could possibly imagine a case where the tip of the locking bar is barely touching a tooth of the yellow bar and putting weight on the yellow could cause a failure, but I couldn't get it to sit like that when trying, so it's pretty unlikely.  However, as the jacks get rusty and teeth possibly wear, or if you simply get one with a small manufacturing defect, such a situation could become more likely.  So I'm not a fan of this design where locking can't easily be confirmed visually.  Even if they had made it so the locking arm sits perfectly horizontal while locked and an inch off horizontal when unlocked it would have been better.While doing my tests with the locking bar I created quite a bit of shaved yellow paint particles just from moving the yellow bar up and down by hand.  This is probably typical of the paint used on jack stands and maybe there's no avoiding it, but it certainly doesn't seem that they used any sort of premium paint.  The coating of yellow paint does seem to be thicker than the coating of blue paint, at least.I don't think the description (or the 3-ton label on each stand) makes it very clear that the 3 ton rating is per PAIR, not per stand.  You have to read the manual to find that out.  They also have big warnings in two places in the manual not to put a car on four stands.  Since it's fairly common for people to put cars onto four jack stands, I don't know if that warning is just there to cover their butts in case someone lifts a car wrong onto four stands and it falls over during lifting or if there's something about these particular stands that makes them bad for using four at once.  Perhaps the bases are just too small.  Of course, using four stands in earthquake country is just asking for trouble so that could be another reason.In case anyone was wondering, these stands only lock at a particular position.  Just because the description says "ratchet" doesn't mean you can ratchet them up while the car's weight is on them.  If you manage to move the locking bar with the car's weight on the stand (which actually shouldn't be possible due to the shape of the teeth), the stand will collapse to its lowest level.