A properly installed cover will damage your TT. Have been using an ADCO cover for over two years. Helps to keep the TT clean between uses. The white top on the cover reflects the sun and keeps inside temps down. Mine is parked in the Florida sun. You don't have to remove the downspouts - just cut up a pool noodle and cover them. Cover the door stop as well, and other sharp edges with bubble wrap. The ADCO's instructions provide an easy method to cover/uncover. When covered, you simply unstrap it, go up top and pull up the sides, folding them to the middle. Then get down on the ground and pull the cover into a clean plastic garbade can at the back of the RV, folding it accordian style. You may need to get on the ladder once or twice to free it from vent pipes, but a pretty painless procedure. Once its in the pail, put the lid on it and store. When your ready to recover, simply pull the cover up and over the RV from the rear as the front will be on top. Then let the sides down and secure it with the straps underneath. Store your plastic garbage can inside the TT. Not really painful at all when you think what your getting from covering it. But - a cover won't necessarily help prevent water damage.