I picked up a Saris Bones in a craigslist deal earlier this year, and it serves my needs just fine. Easy to take off/on, and no problem transporting two bikes. It does hurt gas mileage a bit when I'm using it on the highway, perhaps 5mpg with my Camry (about 15% loss). I've read some tests where roof racks caused up to 25% gas mileage decrease, but since I've never tried one on my Camry I can't fairly compare.