Regardless, this gadget is for me as a memory expansion (as for most major) where I installed the second system Yosemite. The slot for the SD slot is built really on not large and is very good for my opinion (here is not the quality of the product in the form of manufacturing and materials meant).
Along with a Samsung Memory 64GB EVO Micro SDXC UHS-I Grade 1 Class 10 Yosemite is going well.
In brief, until now I have wasted no thought of whether the purchase was OK or not. Also, I have not looked around for competition.