The cable itself works great, but when they say 18", they don't mean the cable is 18", they mean the whole thing is 18" from tip to tip. The cable itself is only about 14", which means that it's too short to reach from my monitor HDMI port to my laptop HDMI port with the laptop sitting directly next to the monitor! I had to prop the laptop up on two large puzzle boxes, which meant it was way too high to use the keyboard comfortably. I honestly don't know what this 18" cable would be good for. I ended up having to buy a 3' one.