I have one and have towed my KTM LC4 all over the west +- 1000 mile trips. I have short hauled a F650 single. I have a silverado with extra rear suspension inserts.
I have a campershell and you can't open the back door. The tray is adjustable, I have the bike as close as possible to the back window.
Versahaul used to have a formula to figure out close to actual weight for distance from pin to tray.
Long story short, it works well, adds LOTS of weight to the back of the vehicle. Try it and see what you think.