My top has been down since I purchased it in June of 2011. It stays in the garage until we take it for a drive on a nice, sunny, no rain in the forecast day.
The top only goes up if we are going into a store for a long period or if it is early morning or late night and a little chilly (which isn't very often in Florida ).
Have had no issues with my top...... No wrinkles, no shrinking and no rub marks.........When I drive, the tonneau cover is ALWAYS on with a towel between the cover and top. When I open the top......I always hold the open button down until the top is fully open to avoid any bouncing or rubbing of the top and mechanisms. Don't know if my habits attribute to no issues with my top.......or if I was lucky and just got a good one