I have had this shell since I bought the truck in 2007. Only thing wrong with it is replacing the light housing behind the rear flip up window. It locks and has 2 keys. I decided to go away from it and build a new removable bed rack.
I just got one of those fabric ones for $200 on CL... I love it, takes ten minutes to put on/take off and serves it's purpose well. We use it only when we are going camping, shade for the dog and the fridge..