Volvo has really done well with the new S60. It's just a wonderful car, balancing everything from performance to safety and everything in-between. I have the T5 version and it is quiet, very responsive, and gets good gas mileage on regular gas (mine got 32MPG highway on a recent trip). Driving it is a dream. On the outside its a great looking car, but not overstated, the interior is comfortable and elegant. Materials and fit and finish are excellent. When you look at when you get for the price, and then add in the 5yr/50000 mile warranty, which includes wear and tear items and regularly scheduled maintenance, it's just fantastic.
My number one favorite feature is Adaptive Cruise Control. At highway speeds it slows down if the car in front is slower that your set speed, and in traffic it will apply the brakes and throttle for you in stop and go traffic. Second is the transmission sport mode. While in D, the car is tuned to be smooth and efficient.
But when you switch to manual shifting mode, the car changes character so the throttle response is more lively and gear shifting is fast and sharp. Third is the Infotainment system called Sensus. It's easy to use and allows you to customize the car to your liking. Finally, I got the Personal Car Communicator option, so no more fumbling with keys!
The navigation system is good but suffers from the lack of a touch screen - that would be an improvement. Also, like many other manufacturers are doing, Volvo provides either a fix-flat system or run-flat tires - but no spare tire. But after thinking about it, I decided this is not that big a deal. I have been driving for 32 years, and have had a flat tire exactly once in all that time. Tires really have become very good and if you rotate them and replace them when needed, a flat is going to be no more common than a breakdown. But just in case, Volvo includes 5 years of 24 hour on-call roadside assistance.