I traded in an F150 for my Accord for gas mileage. So far I am completely satisfied with the performance and mileage of the 4cyl. My biggest complaint is the front seats are rock hard and the lumbar is too high and not adjustable. I spend a lot of time driving and have constant back pain from the seats. Despite the impressive engine, I wish I could get rid of the car already because of the seats. My other complaint is the brakes are extremely touchy and lock up very easily when wet (from rain, etc.).
Engine and dash layout.
The front seats need to go all together. Not comfortable as noted above and the material (my interior is black) attracts everything. The brakes could also be a little less touchy.