I bought this card hoping to achieve the advertised read speeds. The card does not achieve its advertised read speed of 170MB. You will get around 90MB/s. I tested this on two cards. First was the original card that they sent and the second card was a replacement card. Both cards read speed was around 90MB/s.
I am using Sandisk Imagemate® PRO card reader with the card. I tested the card reader and my computer with Pro Grade cards, and they achieve the advertised speed almost 200MB/s.
For many, the read speed may not be important then this is an absolutely fine card but if you need to transfer large files quickly (say 170MB/s or more) then you are better to look for another card such as Pro Grade.