I purchased a new 2013 RX450h after having the original RX400h since April 2005.
Since it's been 7 model years of advancements I expected the new 450h to be more technically advanced then my 400h (it truly is), but I am amazed how much better it is overall.
The 2013 handles much better, is quieter, and the transitions from no engine to having the engine cut on are not noticeable like they were on the 400h; especially at traffic lights.
The 2013 feels much more substantial and you really don't hear the road noise or the loud engine go-cart like sounds that I could hear when I accelerated with the 400h.
I traded in my Lexus GX470 after 6 years for the 2013 450h. The estimated mileage on the sticker is NO WHERE close to what the vehicle actually gets.
I am getting 22-23 average miles per gallon! I called the sales man and he asked us to bring it in. Service dept told us there was nothing wrong with the vehicle. The dealer told us to call Lexus corporate office. We are very disappoitned with the way the sales maanger treated us. He was insensative and blew us off. My family has been buying cars from LONGO Lexus (El Monte, CA) for 30 years. We will nto buy from LONGO again. I sincerely hope that taking the time to post this review will sufficiently warn others fo the this disparity in mileage
Had a Highlander, drove that and the rx350 and Rx450, the rx 450 beat the others.
It's extremely quiet, powerful, luxurious, outstanding build quality and we think very nice looking.
It takes getting used to a hybrid in day to day driving, as it doesn't jump off the line unless you want it to. It's almost a game seeing how good of mileage you can get.
We are getting at least 28 mph in city driving. We intend to keep this vehicle at least 8 years, and gas is not going to get cheaper so it will pay for us in the long run.
The ride on the 450 is smoother than the 350 due to the extra weight of the batteries.
We have had zero problems or defects in the 7k plus miles we have driven.
My biggest gripe about this car is that when Lexus redesign this year it omitted the sunglasses holder. That's about it for complaints. I have just under 40K on it and it NEVER been to the dealer for any kind of repair or warranty work. I have only had routine 5K and 10K maintenance. The OEM tires are NOT great in snow and ice, but I bought a set of modestly priced winter tires on rims so once in "Hybrid Snow" mode, it drives great in all kinds of weather. It is about as comfortable as one can get under $100K. I love it.
Update, October, 2016: For a variety of reasons, I sold my Lexus privately. My primary reason was my age. I recognize, which some of my peers do not, that my vision and reflexes are slowly declining. I have driven 54 years without a chargeable accident, and wanted to keep it that way. So I sold my Lexus to a friend at the top end of the "private sale" range to buy a car with auto-stop and other safety features. I still loved the Lexus and happily recommend to others. I considered a new one, but was simply put off by the new "aggressive" styling on the exterior and the lack of a harmonious design in the cockpit.
This is my 2nd RX, previously owning a 2008 RX400h, the 450 is definitely the better of the two. It is extremely comfortable, fun to drive, well appointed & stylish. I drive a lot, so it is important that I don't feel beat up or worn out after 5-8 hours. There isn't much I don't really like about this vehicle. My disappointment has been with mpg in both vehicles. I am a "hyper-miler", squeezing every mpg out of the car I can. In the 450, after two years I was averaging 30.5 mpg; getting 32-33 mpg's on many trips. Something changed and I'm lucky to get 28.5 now. The same with the 400h after 70K. Raising the issue with Lexus netted "that's too bad", offering no interest/solution to fix it!