Excellent product and high quality construction. Relatively low profile construction minimizes noise on the highway. The only issue I have had is that the tumbler in the locking mechanism is a little finicky and takes some effort.
Took this on a ski trip last weekend and drove a few hundred miles. Worked great! Had to stop and flip the skis so they were facing backwards due to road noise but as soon as we did that the whistling stopped. Very happy with my purchase! Highly recommended!