Dad's view: Around town the R is graceful and elegant. The wide tires and mesh grill tell the well informed that this is the "one" they have been reading about. On ramps are almost a waste of time because you are going well above the posted speed limit within seconds and only the fear of losing your driver's license holds your speed in check. The transmission is much better than previous models except that there is a harsh jolt between first and second gears when you're stopped on an incline and slowly depress the gas pedal. It is disconcerting, but only occurs in these situations meaning that the computer, transmission, and engine may need some fine-tuning. You can use the sport mode and/or shift for yourself, but be warned that this car accelerates very rapidly and by the time you shift into third you are well above any speed limit. I was very pleased that the old "J-gate" shifting pattern has finally been modernized. It is now easy to shift from park to drive and into reverse.
The real forte of this R model isn't the speed, but the handling. The ride over irregular pavement isn't harsh despite the low profile P275/35R18 tires, but it really likes better-maintained roads better, and it loves corners. This car scoots up mountain roads without much body roll and with a tolerance for any curve. It is as fast as any car in this type of environment and, unlike many more others, offers a civilized ride while delivering the fun.
I never felt at home inside the S-Type and, although I loved its youthful nature. The dark and cramped interior made me feel that I was sitting on rather than in a luxury performance car. I much prefer the larger Jaguars, although they are not as fun to drive at speed. I only got 15 mpg in testing the R, but I doubt anyone is going to get much better unless they use cruise control and are up for sainthood.