These are just as I expected.  No surprises for good or bad.  The stays are simply polished stamped sheet metal (possibly plated).  The case they come in must account for half the cost based on what other metal stays are going for and the box is the only part I have an issue with.  The hinged box has a padded top and a spring assist closing but the quality is just not there.  The box feels cheap and the elastic loops that hold the stays in place are hard to manipulate; particularly when trying to replace the stays.  It is nice to have different sizes and unlike some others I have been able to use the shorter stays on some of my shirts.
I have some button down collars that these don"t work well with.  The metal stays are just too stiff...exactly why I bought the metal ones.  I keep some quality plastic stays for those shirts.
All of my stays arrived nicely polished and free of burs or sharp edges.  I would buy them again.