The engine still starts quickly and easily, doesn't have anymore NVH then the day I acquired the car, and I'm willing to bet the gas mileage I get is in the top 5% of Focus owners here. More impressive to me, the car has not ONE squeak or rattle and everything works properly. The paint quality is still nice and flawless (well, not where it was keyed but that is hardly Ford's fault). If ever I had a concern about Ford quality, I no longer do. The only things that have been replaced are A) rear sway bar end links, B) fuel pump, C) ignition interlock, D) front rotors/pads, and D) thermostat housing seal.
And most impressive of all? Mine was made in early 2000.