Excellent product for its intended use, for extra security of mind, one would think banks give this option to add yubikey for extra security. However, the only con about the design of the key is it should have a lid covering the male head to prevent dust and other things get caught in there. as it will damage the key. It should be like the USB stick you buy. I know Yubikey sells accessories for this, but I don't see the reason why this is not part of the key, a design flaw must be looked into. we've already paid through the nose for the key. don't have to pay extra for the accessories. Like any high-quality USB stick you purchase it usually has a protected sleeve on the male end. Very disappointed in this area. either than that everything is great..