This is the best roadster I have ever driven. I've owned Lexus, Corvette, NSX, BMW, and most recently the '07 Jaguar. The SL 550 is vastly superior to them all. The SL has an incredible combination of sport and luxury. The interior is as nice or nicer than anything out there. The car handles superbly, and yet still has a very comfortable ride. The seats are among the best I've ever seen. You can easily drive all day without killing your back. The only drawbacks to the SL are the price, poor mileage, and, inexcusably, a very mediocre stereo and outdated NAV. But the superior driving experience more than compensates for these shortfalls. Drive one, it's worth the money.
Amazing combination of sporty yet comfortable ride. Incredibly flat cornering. Panaoramic top. Very quiet with top up. Great looks.
Stereo and NAV are very marginal. Plan on spending $3k-$4k to upgrade stereo to be acceptable. Also, 7 speed transmission is fine, but shifts are much slower than '07 Jaguar XK and too much travel required in gas pedal to get into powerband. Brake by wire is okay, but still a bit mushy feeling.