I bought this product in order to connect my oldish midi keyboard to my new computer. The original cable had a connector that my new computer didn't have, so I bought a midi-usb cable from a local shop near me. This worked fine apart from latency issues, so I decided to buy this product from amazon. The drivers installed fine, but as soon as I started trying to play things went wrong. The cable would only transmit one note at a time - if I played a chord only one of the notes would play. It also cannot handle different notes quickly after each other - only the first note is played. Sometimes after I play a note it never registers that they key has been lifted up again, and the note plays indefinitely.
In summary, with this cable my keyboard was almost completely unplayable.