We have had the V6 for 6 months and it is a good buy. This replaced a 2000 Buick LeSabre and though they are different types of cars I did expect a little better gas mailage. The best on the road so far has been 22 MPG. The old land creuser got that in town. So I don't think a six speed trans and all the new tech stuff has really make such a improvement. But that is the only dissapointment so far.
It is the right size for us, not to big or to small.
Compared to the 10 year old Buick the driver information center could be improved for faster info.