I just ordered an '11 F250 Supercab. I asked my dealer to get and install a manual rear slider window when it came in. He called around, and the manual slide rear window is more expensive than the factory power slider, not even figuring in installation. I looked at about 3 internet places and confirmed this. So, who has a power slide rear, what do you think of it, and if you have had one for a while, is it as durable as a regular power window?? Thanks, Pete