I've seen a few different roof ladders advertised. The OEM version seems a bit flimsy to me, based on one I've seen installed. Does anyone have a recommendation on a more robust and sturdy ladder?

 

I don't have any experience with Voyager Racks, but they have a ladder that seems to be more substantial... larger diameter bars and also includes a bar across the bottom where the OEM one doesn't. I have heard some complaints about welding on their racks, but nothing good or bad about their ladders. Having said that, I have been considering getting one myself...