I put a lot of miles on my Prius. I bought it in Nov. 2004. I now have 85K miles on it. Everything is working fine. The battery continues to charge with no evidence of fading. My average MPG is about 49 over the life of the car. True, I have to explain to people that I am not an enviro whacko, just a gadget guy who drives a lot of miles. My car has much more than broken even over my previous VW Passat, which averaged 24 MPG. But to each his own.