I don't like the Focus interior either, but I still think it's a great car.
I would, however, never, ever buy one. I just don't see the point - the wonders of supply and demand mean you can get the next car up in the range, the one that cost thousands more new, for less when you buy a used Mondeo. Quite why you'd want the Focus instead when you'll pay more money for a smaller, older car with less kit is something I don't understand, but appreciate that others do. People cite running costs but thats kinda irrelevant when you've just stumped up an additional £1500 just to buy the thing.
Still, if you must have a medium sized hatch, a Focus is about as good as you'll get.