For comparison, I put a JC Whitney ladder on mine. I like the Aluminess quality but it's out of range for my remodel. I had to sand, prime with a metal etching primer, paint, and drill holes in my door. That said, total cost was well under $100.
The ladder seems solid. Much like the rear tire mount (directly to the door), the door is solid (three points) when closed. I wouldn't climb it when the door was open.
Another issue with this is that I need to install a door swing stop so the ladder will not chip the paint when the door opens too far.
All penetrations are bedded in butyl (sp) tape.