I have both the OEM sunshade and the convertible car cover.
OEM sunsahe is nice, a little to thick to fold up other then the way Porsche wants you to. I use it for short trips away from the car. I store it standing upright behind the psgr seat.
The convertible cover I use when I leave the car out all day. It is much easier to wash the cover then the top and it does have a cloth covered dowel or something that goes under the leading edge of the rear trunk. The only problem I have is with the side straps that go through the door handles. On windy days the velcro straps rub, requiring me to buff out the area between the door handle and the window. But that is much easier then cleaning bird pooo off the top.
Hope that help
