I bought this car as certified and received an extra 3 years or up to 100k miles on it so that makes me comfortable. I am 6'4" and weigh 240 lbs and I found this car to be quite comfortable and spacious for my size. The head room is plentiful as well the leg room in the front. I got out of the vehicle and sat in the rear passenger seat directly behind the driver and my legs did not touch the seat. The acceleration for a luxury sedan is great. On the open road I would accelerate to the low three digits and the car kept up with my demands. Also I found the drive to be very smooth, quiet, relaxing, fun and enjoyable.
Leg room (I'm 6'4" and have other tall family members) and they all fit comfortably.
Dealerships should upgrade the navigation software packages if the car is more than 3 years old.