I didn't see any mention of noise from your system, like road noise. Not sure if you have the same problem or not, but I've had bad luck with the door jam method. My wife and I borrowed a kangaroo luggage carrier from my folks. We were visiting and went home with more than we brought, gotta love Mom and Dad. We put it on a Pontiac Grand Am (lay off, we traded it in for the Edge!) with no roof rack. So we had to secure it between the body and door, like your system. HORRIBLE. The entire trip home I told everybody in the car to not talk to me. Every conversation went blahblah what? blah what? blah. The noise it made was horrible at highway speeds, its was worse than driving in a convertible on the highway. After it was off the door seal was never the same and was louder at highway speeds than normal. Just wanted to see if you had this problem, or at least warn potential buyers.
For the tailgate system. Have you put any kind of luggage on it, other than bikes or ski's. I've been told luggage can smell like exhaust or gas. Just wanted to see if you had this problem. Would like to get a tailgate system for luggage when we bring the dogs with us. Thanks!