These are drastically slow micro SD card and here is my experience with them,
These are drastically slow to detect in laptop and reading speed sometimes gets disturbed for no reason at all. The SD card has no special feature or function for which it is overpriced and the hefty off price is just for the satisfaction of brand’s name.
Don’t try to install applications on SD card for this SD card because it is too slow and applications will misbehave. I tried installing applications on external card after the android update but have to switch to the old internal storage after this experience.
The looks and design of card is only good thing and paying for design which nobody is going to see even the one buying it himself because it will be embedded in phone and thus I do not recommended going with these SD cards.