I use this lead for connecting a JBOD external drive unit to a windows 7 PC via a port multiplier host controller, the speed is brilliantly fast (compared to USB2) the cable is well made, if a little on the stiff side and connections are good too. quality is 10 star!! and the service from the supplier was 10 star too. the only time I can see me not using this cable is when USB3 gets a firm hold, until then its the best you can get.