Had one on our slide for 12 years and will get them on our next trailer. Sometimes it flaps a bit in the wind which can be a bit irritating and water does pool on it but so what. Just make sure you are not standing beside the slide when it is retracted. We get a lot of crud from trees where we keep our rig and I would much rather see that and snow sitting on the topper than on the slide. Anything on the topper goes overboard when the slide is retracted rather than getting packed up against the seal by the flange on the edge of the slide.