I love driving my STS. The ride is comfortable... far more so than the CTS. There's plenty of room in the truck for several sets of golf clubs. The stereo system is excellent, with many options available. I also like the moon roof which opens easily and quickly. The mileage per gallon is less than the CTS, at 24 mpg on the road. The keyless start is excellent and safe, provided you don't leave your keys at home. I have had a few problems with the GPS, however. Each time I have used it, I have been misdirected.