The best so far
By cinemel on
2006 Cadillac STS V6 4dr Sedan (3.6L 6cyl 5A)
This is my favorite STS so far. It's the third one I've owned. It handles responsively with a European tight suspension, not as mushy as the DeVille.
The keyless ignition and entrance ease is fun and very convenient. Memory seats and other setting also are efficient and effortless.
The gold/yellow readout on the radio, dashboard, etc. are unattractive to my eye. The cool green graphics on my 1999 model were much better. Glove box is too small. Some of the setting process for various features is a little too complicated.