The interior is quite nice. The cloth seats are comfortable and the dash layout is uncluttered and easy to use. The radio controls have nice tactile feedback. The engine is peppy and unlike some other sedans in this class, the Focus doesn't feel underpowered merging or passing on the freeway. No regrets in first few months after purchase so far.
Gas mileage. Stickered at 26/33 with automatic transmission. With the 50-state emissions engine, averaging >35mpg in a mix of city and highway driving.
Standard ABS brakes or cruise control would have been nice.