Hi , I think all of the posts cover most of the points, If you don't need a heavy duty off-roader you'll be hard pushed to beat the 400h, Goes like a sports car when required but has the economy of a large diesel when ur not pushing it on. You can't help but grin from ear to ear when you floor it knowing there's not much out there to catch it but at the same time you can coast at 70 mph!!! with all the power units off. Like someone else said, you find yourself coaxing it along with the slightest amount off presssure on the accelerator and the car always feels like it totally effortless. You need to get a good test drive to appreciate how good the car feels. Go speak to a dealer you won't regret it but your wallet might lol
ps milage wise never under 27mpg but have managed over 40 when really watching what I'm doing and thats over the 30 minute period that the bar graph logs.
Like yourself I had all those questions before I bought one but drive one, buy one, and enjoy the car everything works just fine