This large sedan has a beautifully executed interior, perfect for limo duty. The XTS is roomy, luxurious, and quiet inside, with comfortable seats. It comes as either front-wheel drive or all-wheel drive. But the ride feels too ordinary for a luxury car, and handling isn't sporty. The 3.6-liter V6 powertrain lacks finesse, mostly because of its coarse sound when prodded. Still, it ultimately performs well and returns a respectable 22 mpg overall. The unintuitive Cue infotainment system is frustrating to use, and the high rear deck impedes the view aft. A V-Sport version with a twin-turbo 3.6-liter engine gives the XTS V8-like power. Reliability has improved to above average.