I purchased a 2008 with package # 6 on April 24th the next day at work I touched base with the other 6 Prius owners and the all said the same thing that their backs hurt after a 2 to 3 hour drive. On the 25th I started my vacation to Myrtle Beach from Maryland and after the 6 hour drive my wife and I were just about crippled . We are both 64 years old. I traded a 2007 Camry Se v6 which you can ride in all day long with no problems.Average mileage 22mpg overall.. But I still love my Prius and the 48 to 53 MPG it gave us on the round trip. Now we stop at the states visitors centers and walk around to get the kinks out. Can't wait for the 09's there may be a second one in our future. Sgt Tip