My 2012 Focus replaced a 2002 Elantra GT. It was a very nice car and proved to be extremely reliable in the 9.5 years and 180,000 miles that I drove it. It was falling apart at the end, though.
It never got anywhere near MPG stated on the sticker. I think the sticker said something like 29/34 and in actuality it was more like 21/28 (30 on a good day)... which is terrible, really.
The Focus, on the other hand, has been getting pretty much exactly what it said on the sticker from day one.