I see you have tracked your car according to your profile pic. How is it at the track? That'll be a big plus.
It's fun. I had a Focus SVT with a charge-air cooled super charger before, so this is very similar, with way more low end torque, so it is a little quicker on corner exit. It is NOT fast. Without some added suspension work, it is prone to some oversteer (sounds odd, no?). I learned that at the STOA event in April (I did not go off, but with the stock suspension I could sense the twitch in the seat of my pants). It's perfectly controllable, but is strangely nervous at the corner limit. It does not push. At least, I did not notice it. I'm dialing mine to be a little more neutral (which for me will mean I can drive it a little closer to the handling limit and feel confident that it will 4-wheel slide and not snap oversteer). At the track with my own car, it was very compliant, but I only tracked it the once so far. I also have adjustable coilovers. Circumstances have conspired against me attending other events so far (although the STOA thing kind of counts, but not in my car).
I'm also of the opinion that these cars need some added cooling for track use. That's especially true in the summer. If you track a car, you know the drill on brakes, oil coolers, radiators, fluids, etc. My only event so far was at the of end of March in perfect, cool, dry conditions. The water temp (per the mountune/Cobb AP) hit about 215 tops. On a hot day with stock cooling hardware, that could really spike. i ran water/water wetter which helped manager the temps a little.
Based on my limited car-to-car comparison at STOA, (as I've said elsewhere) it is my opinion that the Focus ST is a better (faster, more stable) track weapon in stock form. It's longer, and wider; it has bigger meats and more power. It is heavier. Not everyone agrees. BUT: You can turn this car into a monster. Ask [MENTION=636]RAAMaudio[/MENTION] and [MENTION=9]rodmoe[/MENTION] to name a couple of the crazies on this board.
YMMV.