My 2010 RX450h Premier was 20k miles when I bought it at 4 years old, serviced by Lexus Snows every year. Now 80k, still serviced there every year, not expensive and 15% discount with Lexus Club - and they clean it and lend a new car, even with just MOT. With the service the main battery warranty is 15yrs. I had to buy a new 12v battery last year. Have seen 34mpg rarely in summer, but generally 30-32 over time. I don't use Eco, but didn't notice much difference anyway. Runs on Michelins which work well. All round it does the job very well; works, tows well, comfortable, smooth, but has plenty of power if needed, even if a bit lacking in feel. Gripes? Absurd costs to upgrade maps, but I use Waze or Google Maps. Low fuel indicator only comes on when 20 miles left. Cruise control + & - only goes in 5mph steps. (Nothing of much importance really).