I got a Thule T2 I put on my Element. Best thing ever, sooo easy to get bikes on and off, "folds" up down and out of the way pretty well, solid as all heck, holds bikes tight....
Only downsides are:
1) Living in fear of being rear ended - though for me I know I would pull under my deck/into my garage with a roofie, so hitch mounted is the better choice.
2) I did a couple snow rides this year and I think the snow/ice/salt from the road gunked up the little release lever for the swing arm - it stays pressed down and you kind of have to "pry it back up" to get the arm to lock onto your wheel.
Other than that, I love the thing.
I also have a 3 bike saris bones rack on my jetta. Does the job (with a frame adapter bar) well, but over the years has scratched the crap out of my paint. Though I think thats going to happen with any trunk mounted jobbie.