Uncomfortable seats 
2007 Toyota Prius Hatchback 4dr Hatchback (1.5L 4cyl gas/electric hybrid CVT)
Uncomfortable, at best
 Overall this is a great little car, but be careful if you don't get the adjustable leather seats.  I've had the car for about 1 1/2 years and although I've saved a lot of money in gas, I've spent a lot of money on acupuncture treatments for my back - and I didn't have a back problem before I started driving this car.  It seems they put all the expense under the hood and then skimped on comfort.  I tend to get a new car every 2 to 3 years and I've never had one with such an uncomfortable seat.  I'm selling it soon.