The price and color assortment is great.  The ones delivered are a little different from the picture.  They have sort of gaudy gold pieces at the neck and around the loops that fit over the glasses arms.  On the other hand, some of these allow more adjustment to the loops, so that's a plus.

I got these instead of metal because I'm allergic to most metals.  These have metal at the back of the neck, so I was worried that they wouldn't work out.  But so far the metal parts seem to stay away from the skin.

Mostly I wish these were longer.  True, they won't swing around and perhaps hit something, but...I guess I'm comparing them to others I've had.  The glasses are hitting at the top of my breast bone.

Seller was excellent.