I have owned a number of Buicks, including Park Avenue Ultras (last car 2000 model). I am very pleased with this car's performance. It is "tight"--a term I would use for agile, steady handling, much like a German car. The Northstar engine is super responsive, and emits a NASCAR like growl under accelleration. Seats are comfortable and it has many great new features such as heated windshield washers. Road noise is well isolated at cruising speed. I believe the only down side to this car will be fuel economy. I have averaged about 19 mpg so far vs. an average of 22.5 with the supercharged Ultra.
Engine response, ride, silence and tight handling.
Jack for cellphone is in console compartment. Not handy to leave phone inside compartment. Trunk could be bigger and fuel economy could be better.