One man job to get it on, but then you'd need another couple of arms to hold it while strapping it down I guess.
Me, I wouldn't trust this to hold my bike safely. It's one single attachment and the movement of the bike will put a lot of stress on that point? Further more, it's bad for the car's weight distribution to add more than 20-30kg to the rear - this solution adds ~250
Bye, bye front wheel control?
Just my 0.02