It's only just March, but I collected our new (to us) RX450h yesterday. The contributions on this thread helped me a lot, with particular thanks to Rayaans and Glover.
Only had it a day, but I agree about the warm up time of the engine, I'd say half the time of the IS. The seating position in the GS is not very different to my Convertible, but the RX requires a slight step up to become seated instead of a fall into a bucket !! No meaningful mpg figures yet, but I'm fascinated watching the graphic telling me where the power is coming from, hope it doesn't become the guide to my driving.
After collecting it from Wolverhampton yesterday, I rang Mrs Ledzep from Newtown (halfway). She of course asked about the car, I replied "It's like driving an armchair".
It's a 13 plate RX450h Luxury in Garnet Red with black leather, Lexus fsh and 55k miles. Looking forward to my day off on Saturday so I can have a play with the car. I'll take some photos so I can prove it really happened.