This is an excellent card reader, well designed, nicely implemented. It has a built-in, magnetic bottom plate so it will stick to any steel surface (like the side or top of your PC tower, for example). Not to worry, though, if your computer is plastic, there is a small steel plate in the box that can be adhered to a plastic case or even a laptop lid if desired. The magnetic base is coated with a rubber material so it won't scratch the surfaces it is sitting on of stuck to.
As for performance, it moves data fast, it is a huge improvement over the readers that I have used previously which were USB 3.0 based. It is a bit pricy IMO, but has some features.