Anyone use covers over there camper?

I have used one on my camper. I started with the CW versions, which can be described as disposable. They last a year, two if you push it to taters, and cost about $200 - 250. I moved on to a Calmark cover, which looks like it will last maybe a decade or more and cost about $700. One problem with the Calmark: it is heavy and that discourages one from putting it on for short periods. In fact I don't know that I could do it alone and from the camper roof access ladder like a could with the cheap version. It is pretty easy with the 40' ariel work platform that I usually park next to the camper though :).

None of them actually keep all the water off, but here in California sun is the enemy of longevity, and the camper looks much better kept under a cover than not after a few years.