These are great card readers!
I have this and the dual-slot SD reader as well. They are fast and stack and stick nicely with the magnets. They come with a stick on metal plate if you don't have anything metal to stick them too. (just be careful around magnetic media such as standard HDDs) I kind of wish they had more varieties with say 1 SD and 1 Micro or even 4 slots with two of each but one USB cord, but maybe 2 is all the bandwidth one USB 3 cord will handle. (It seems like I saw the 1 SD 1 micro previously, but weren't available when I got mine.)
This was purchased to specifically work with my drone footage and drone controller screen capture video at the same time. It is working very well for that. I am also impressed with the build quality.
Great and fast nice product!!!