Lexus took its best-selling model, the RX, and gave it a redesign inside and out for 2013. Cars.com reviewer Kelsey Mays takes a look at the RX F Sport, which adds a sport-tuned suspension, aggressive styling cues and an eight-speed automatic transmission. While it may look fun and get better gas mileage, Lexus buyers might want to consider other RX trim levels after experiencing the F Sport’s harsh ride and uninspired handling, Mays suggests.