I have a 2002 ZXS automatic with about 45,000 miles on it. The only problem to date has been the replacement of the seat tracks on the front passenger seat. They were a weak point that Ford fixed in the 2003 models, but having a teenaged daughter who flopped into the seat and flipped the recliner did not help the problem. Also, I had to put a new multi-disc CD player in it as she had put one of her home-made discs with a paper label into the thing and the paper label got stuck inside of it.
The car handles very well and performs acceptably for what it is. I would not buy another, however, as Ford has not updated the American version with the new chassis and other improvements that they made to the Euro version. Apparently, they feel that they cost would be too high and Americans would not pay it. Well, that same updated version is sold as the Mazda3 and it sells very well, thank you. That is what I would look into buying were I to replace my Focus, that or a Mazda6 V6 if I could get the same sort of a deal on one that we got on the 2005 Sportwagon that we bought last January.