This is my first Cadillac. It is a great handling automobile. I chose the black color. It is very good looking, better than a BMW or Mercedes, in my opinion. The brake performance is excellent, but has a squeal problem. Dealer service has been wonderful so far. I will buy one again.
The Navigation system, 15 speaker Bose stereo system, and performance.
The 2005 Cadillac STS is by far the best car I have ever owned. I traded a 2003 CTS in for this one. The CTS is sort of a "Starter Cadillac." The STS' bells and whistles seem to never end. I keep finding new ones. Its ride is awesome.
The V8 power, navigation system, handling and overall comfort.
I have to admit, being 30 years-old and buying my 6th Caddy, this one is the nicest by far. Every time I am out, people comment on the sleekness of it and it's stately appearance. They do have to fix a couple things on it however (stated below). But overall, it's American made and put together cheaply. It's only worth $30,000 at the most.
Keyless entry, heated/air seats, BOSE surround sound, navigation system's ability to change languages (I speak Italian fluently and it's amazing how I can communicate with the car speaking Italian!)
Bluetooth stinks. I go through brakes like I change underwear. The gas mileage is poor. The glove box can only hold three tissues and then it won't close after that. The darn gas tank needs to be put on the other side! UGGH!
My miles have been - 33% city, 33% 300 mile trips, and 33% long trips. Around town I ave between getting 20 to 21 mpg. On the 300 mile trips I ave 24 mpg, and on long trips I avg. 25 mpg. With 36,000 miles and counting I have not had any problems requiring service. This is my second Cadillac, after two Buicks. I will trade it in for another Cadillac at 70,000 to 90,000 miles. My experience with the dealer has been tremendous. They pick up and return my car for service. They offer a ride if I drop off the car for oil changes. When I go for an oil change I make an appointment and wait in a plush waiting room with hot coffee and pastries available for "free."
The ride is great and the handling is great. I like the features including FM radio, On Star availability, the backup sensor and the rain sensor.
I have not used a car with a rear viewing camera but it would be an option I would consider. I can think of no other improvements.