"A fully functional memory card"

This card has performed flawlessly so far. No read or write errors, or speed problems. Not much more to say, but I had to fill up the Amazon word count.

"only capable of doing DDR50/SDR50 max"

This card advertises itself as UHS1 but it's actually UHS50.This means that it will not go up to SDR104 speeds/throughput.Not necessary bad, just false advertising.