Read a lot of reviews

And they have a plastic cover on them. They looked banged up out of the bag, but once you take the sticker off they look great. I recommend for testing ideas. Im testing them now with different people as keychains to check their durability because they dont have protective covering on the back, and they also are not double sided or have an epoxy rounded edge. But for price and turn around time its good for a check. 1mm i put to test resolution and it was ok. I put it through a tough test. Overall i think they have room to improve but great for checking concepts and to be honest, not one has been damaged as of yet, being one sided and all. So they are somewhat good