Works well and as promised. I compared it with a normal cable hooked to the USB3 port and then with this one and there was a doubling in data transfer speed. But the device was not a USB2 pen drive so you may see better results. Read Device / Transfer Cable / USB Port - All these 3 should be USB3 standards to see the full speed of this.
Im happy with it. Its a tad bit expensive but there's micro USB phone cables selling for the same price so cant grumble too much.
As on 22-Mar-2019 : The performance has dropped and it doesn't sense usb drives etc plugged in. Have to pull out and plug back in several times to get identified. Direct to the PC rear USB port attempts with the drives work perfectly which proves its not an OS or system issue. When this cable comes in between, the devices stop or drop out half way thru running or copying. reduced one star for this.