Back seat is small. We don't use it much. I traded in a 911 Turbo. RCF not as visceral, but more comfortable, significantly higher quality, and absolutely no problems. Porsche had lots of niggling problems; Porsche service was PIA - waited over a week for service on multiple occasions. This is our 9th Lexus, the cars never break/give problems. The car is chunky though - 3958 lbs. Heavy vs competition. Mileage has been a pleasant surprise - over 18 in city and 27 or 28 on highway. Levinson sound is great. Balanced handling, smooth progression when pushed - easy to drive fast. Like spoiler deployment. Seats are awesome. Wish it had power folding mirrors. Nice exhaust sound. Steering wheel is "just right" - paddle shifters easy to access and high quality. Engine block is blue - looks cool.
This car is a balance between luxury and performance. For those people looking for straight luxury or straight performance this is not for you. I own a Lexus LS and a Porsche Carrera 4. The RC F fits somewhere in the middle. I am very happy with car.