I use an Adco and find the material very breathable and soft where it touches the RV. It might be my imagination but it always seems more shiny when I remove it. Maybe it polishes it? At any rate I am very happy with it, but the thin breathable material is prone to getting a small tear here and there after 2 years. Also I don't use it in winter. Always afraid a bigger snow or ice and I'd never get it off if we are planning a trip. All in all I am happy with it. Not a lot of fun to put on or take off but it does it's job. Is it worth it? Well if you are like me and like your RV nice and clean for a trip, it's good to keep it that way. Does it protect it? I am sure it does but with modern gel coats I am not sure just how much compared to the length of time it's uncovered vs covered.