The keys I ordered for my Leer topper did not work. At first I tried to reach out via their website contact form to figure out a return. However, the form did not go through. I then left a review on here talking about the experience. Within an hour they contacted me to figure out the situation. We got things taken care of, and the customer service was great! Sometimes replacement keys are trial and error, which makes cuatomer service extremely important. ai appreciate their help! I would not be concerned about using their services again.