I should have added to my initial Rav4 comment. Yeah, I use the bike mount (and could have easily bought just the mounts and used a piece of wood, but I like the adjustability that I get with the bar - I can slide the mounts around depending on how many bikes and which bikes I'm using.
And, yes, I can also get the bike in with the wheels on, even a bike with aerobars. There's one in there right now like that! But, it's less secure and can slide around. I worry about the on my Colnagos - they're all handpainted, and the paint is notorious for chipping, so I'm a little more careful with those guys.
For 3 days, I get to part of a thousand other journeys.