Have had this car over 2 years. Most reliable car we have owned. Since I am 70, a lot of cars have been owned including 2 of GMs best. Had driver's door adjusted in first month and since than only oil changes and regular maintenance. There is a hesitation, but only when you want to be a jerky driver. Not as smooth as GM cars I have driven. 28 mpg on a 4000 trip last fall, driving out west where the speed is 75+ mph. I get 21 mpg hacking around. I must have an exceptional car because I have not had any of the problems others have mentioned. Looks like I will get around 35000 on stock tires.
I purchased a 2005 ES330/new... had it in for service 4 times. The transmission always felt like it was missing when slowing down and then accelerating. Once you got going it is a very smooth ride. Apparently the design is flawed. There is a computer chip that needs to refresh, which is fine if you never yield or slow down to go around a corner. The dealership offered a new ES3 50..with extra cost... but I just purchased a 2007 530i BMW.
Work on that computer chip...the change from a cable to the computer chip began in 2003...too many bright people out there to not come up with a better design.