The packaging is a sturdy cardboard and plastic hanging box with some foam packing material. My package of 1.2mm rivets came through the mails undamaged, but the 0.9mm pack had a lot of snapped off rivets, probably more than fifty altogether. Fortunately the broken off rivets are perfectly good for use and all or most stayed in the package.
To attach them, you drill a hole for the shaft using a pin vise and a very fine drill bit. For the smaller ones I used a #73 (.024) and for the larger a #70 (.028). No problems there, after you mark where they need to go and use the magnifier of choice.
Individual rivets are highly electrostatic and have a strong desire to fly across the table and vanish, or randomly cling to your fingers, clothes, beard, tools, and model. Nevertheless, the result is highly gratifying, giving a good sense of detail after painting. Very little flash and I experienced little variation in the shafts or heads.
In my opinion this accessory is superior to, for instance, cutting rivet heads off another model or trying to form them out of heated sprue. They can be installed with tweezers, or even very deft fingers.
Plusmodel lists them for Euros 6.80, or $9.70 USD. This makes the individual rivets about four cents each, perhaps a bit pricey but cheap enough that you can afford to lose some to the carpet monster.
Highs: Adds to the look, not difficult to apply.Lows: Small parts with a mind of their own.Verdict: A good product to enhance to look of any riveted vehicle or structure. Requires tweezers and Optivisor.