This is my third reader from this exact model purchased in the last 8 years.
I earlier had two of this exact model, both purchased in Germany. They both failed after 2 or 3 years of usage. When they fail, they would refuse to read anything at all - the system simply won't detect it.
I was cursing myself for purchasing this, and purchased another brand last year called "Quantum Zero", but that turned out to be an utter garbage. It would mark all the files in my card as corrupted.
I ended up purchasing this again, and it works well and all my cards are back to normal (I use SD, CF, and a variety of other cards for various purposes).
I have rated it merely 3 stars due to my negative experience with 2 of my previous readers of this exact make/model that failed in 3 years time.