The product does not close tightly due to the poor design of the tilt handle. It's like they're an inch too long and no one checked them before they were boxed. They plan to redesign it in the future, but the current product has to be removed. They also said it's safe to drive with them, but the manual says that's not the case. They seem solid, but I don't know anything about highway slip speeds. I have increased my rating from 1 star to 4 stars because the product works as advertised but still needs some improvement on the slanted panels. I will add pictures of it in use once I have it fully installed on my van. I believe it will be a 5 star product after the redesign.