I've owned three new RX's from 2004 through 2008. I went from no Nav to a good Nav to a great Nav and now to a spectacular Nav in my 2010 RX. The mouse-like control on the console is a killer app. Thanks to the adjustable tactile feel on the screen pointer, it is very easy to select Nav, Sat, Audio and numerous other vehicle controls even while you're driving. Thanks to a larger vocabulary, the voice recognition is far superior to the 2008/2009 version. This RX is quieter, rides firmer, and although noticeably larger, it still handles like a car. With no more strut towers in the luggage space, four golf bags easily fit. I like the 2008 taillights better but overall, the 2010 looks better.
Mouse-like screen control, expanded voice recognition vocabulary, firmer feel, quiet ride, unobstructed luggage area and very comfortable seats.
The 12V power outlet and USB outlet are inside the console under a removable shelf. Very inconvenient. It should have been outside more easily reached.