We get around 29 mpg in town driving. To put that into context, we got less in our Golf 1.6 FSI which it replaed. My Mini Cooper S JCW gets 28.2. S, not bad for a big, comfortable cruiser.
Buy a Prius if all you want is economy. Buy the RX400 if you want combo of luxury and reasonable consumption. As such, I think that it is really fab.
By the way, it is one of CAR's top 10 for 2005.