Since I left the dealership with my 2006 S40 I've had a smile on my face. It's fun to drive. It's quick more than it is fast. It's a smooth quiet ride, very comfortable. Has an amazing sound system with easily accessible controls. Has a large trunk with seats that fold down in the back. But the best thing about it is the price.....it's actually affordable.
Hands down the sound system is my favorite feature. I'm 28 and love to blast my music. It's got a 6 disk cd changer in the dash and has 7 speakers so you can feel the bass. And you can change the station or track while keeping your hands on the steering wheel. Volvo is all about that "safety".
The only improvement I would recommend is on the body. I think the body should be a little more sleak. I think the roof has a little too much roundness to it and should have more of a slanted look.