I've had the Sunguard covers on my Contessa windshield and side windows for about 3 1/2 years now Steve.
I highly recommend them. Durable and I keep them on year round at the house here in Florida Sun. No fade at all.....
I had the snaps put on, easy to put them on the rv, small drill bit for starter and a little bit of sealant when screwing into fiberglass after measuring them.
They sent a small side door window cover, but I called and told them I needed a large cover due to a center door coach, sent out immediaitley to me so customer service is good too.