I owned a Volvo S80 T-6 then a Volvo S80 V-8 AWD before trading the for the GS350. Yes, I miss the V-8 growl of the Volvo, but that's all. The GS is superior in every regard and I only sacrificed 8HP. The GS is much easier to live with having 225 series tires rather than the much softer and lower profile 245's on the Volvo. I loved my Volvo, but I knew everyone in the dealer's service department by name. I experience Lexus reliability with my GS. Routine maintenance and that's it. The GS is fun the drive, corners like a cat, and scoots like a scalded dog.
Flawless. Fit and finish is second to none. Drivetrain is smooth and the interior is exceedingly quiet.
Adaptive cruise control on a car like this s/b standard equipment. It lacks some trunk space, too, but I'm having to look very hard for ways to improve this ride.