cyril7: I would suggest they looked at your feedback and compared it to the manufacturers spec, other feedback at their own test and concluded you did something wrong as it clearly didn't match up, so rightfully rejected the comment.
Clearly something is technically wrong in your end.
Cyril
The only change was to swap the Ext SSD supplied cable with the PB tech cable... same USB port, same laptop, same external SSD drive -- the only difference was the cable. Using the supplied cable is 500MB/s, using the pbtech cable speed is 25-30MB/s.
How would you explain that?