Had my 2005 RX400h for a couple of months now , i am finally pleased with it after a lot of issues with the preparation of the car from Quicks ( Evans Halshaw ) - advise buying from a lexus dealer , even though probably costs more. 2005 vehicles particulary are subject to a couple of recalls so check that these are done.A few owners report that the 12volt battery that powers the electrical system ( it does not crank start the engine ) go flat if parked for more than a few days.Mine had a new battery fitted so i had to reset the idle speed control ( engine kept cutting in too much reducing the mpg ) , sunroof and windows .I also had to have new brakes cables as the handbrake kept seizing on ( common fault on any rx apparently ) I had the wheels refurbished as they were flaking and rust bubbles appeared.Bear in mind lexus parts can be expensive so always phone at least 2 dealers for prices as dealers have quoted me different prices for parts - 1 quote of £720 for a parcel shelf and then another one of £375 ! from a different dealer , labour charges are always over £100 per hour. I doubt many drivers get 35 mpg as lexus quote but they are better on warmer days and in town or B roads as you can run more on electric as long as you have a very light right foot !!!!! Anyway , that's enough about the bad bits , now the good bits - It is pure luxury , quiet effortless driving in style . They have their own unique character that some find bland - it's a bit like marmite , you either love it or hate it . In my opinion i have the best of both worlds - economy if i am careful and speed if i step on the loud pedal.Whilst it may be a 4x4 , i don't suggest you go off-roading , it is basically a tall road based estate with low ground clearance and front wheel drive but electric power is sent to the rear wheels after wheelslip is detected.I previously had a landcruiser but wanted better road comfort rather than off road ability and that is what i now have and i love it. Hope this helps , nigel.