Yes, that was what I'm talking about. As a former Nissan Sylphy owner, the change to the Focus Titanium sedan already brought a huge smile to me with the massive improvement in handling and driving dynamics. So I can imagine going from the Sentra 1.6 to Focus Sport hatchback to yield even greater results. The power and handling between the two will be just enormous. Even when going from the Sylphy 2.0 to the Focus, I can feel the latter to have much powerful acceleration. You just feel your body pushed back to the seat in hard acceleration if you really floor it. The Focus' 2.0-litre engine is most powerful in terms of horsepower and torque when compared to most common 2.0-litre engines in the market, and with the Powershift transmission there is little loss in energy transfer. The NIssan Sylphy works on CVT gear transmission so the acceleration is smoother and not as powerful as the Ford. Since your vehicle is still new, guess you cannot have so much fun yet. Maybe after 1500km then you can start to "test" the performance of the car.
So, from your previous experience with 3 generations of the Honda Civic, they cannot compare to the handling of the Focus. Good to hear. From what I read, all Japanese will not match the Ford Focus handling other than the new Mazda3 that may come close. I haven't driven the Civic before, but based on my limited driving experience with the Focus vs. Nissan Sylphy and Proton Preve Turbo, the handling and driving dynamics of the Ford Focus are surely one fascinating experience. I could just imagine the Focus Sports hatchback to deliver even more (than the Titanium) with even greater thrills and driving experience.
I haven't tried Ron97 before but Ron95 feels just fine to me.
As for juddering, it is normal when the mileage is below 1000km. Certainly very noticeable to the point of worrying. It will get lesser once above 1000km, gradually diminishing once approaching 2000km. Above 2000km I would say it has about reached the plateau, and any further minor jerks in low speeds may be inherent in the transmission itself.
Sound system of the Focus is one of the best I have experienced. Very full and rich sound that is 3-dimensional. The bass is also full and taut. Sony sound systems are certainly good. All other stereo systems sound thin and 2-dimensional in comparison with poor bass lines. The bass in the Focus sounds as if there is a subwoofer hidden somewhere in the car. I am not sure if there is actually a subwoofer tucked nicely somewhere in the boot or something. I'm an audio enthusiast and the sound system of the Focus is certainly commendable.
My phone is mostly in my pocket when I am driving. Occasionally it's on my lap. No navigation system. I haven't really used the USB port to charge the phone yet, surprisingly but true. Will need to try that sometime. Blutooth connection works okay for me, though I haven't really played with the Sync too much. The Sync voice recognition which enables the driver to call someone just by uttering his name is pretty cool.
As for seating position for your wife, the Focus sits pretty low so it may be an issue for short drivers. You can try pushing the seat as close to the front as possible then pump it up so as the legs can still reach the pedal.