I like that you can adjust everything via a touch screen rather than dealing with messy dials for everything. I'm more looking to the sound settings than anything, having a button for fader, balance, bass, treble sucks, being able to adjust all those settings super easily, is bomb.
Also trotter, take a ride in my s80 sometime and you'll be a convert. It's like a Buick, comfy, smooth ride, massive, BUT it's got a straight 6 putting out 230hp so it's got some zip, handles really well for a 2 ton mammoth, and a real nice stock sound system.
The s40 is the corolla/accord of their line-up, not really much going there, the new s60 is a step up from what they've had in years past, and then the xc 70 / xc90 are nice SUV's, but all their cars are a smidge more expensive than any other counter parts. I wish they weren't made by GM tho :/