I test drove an 08 Sentra, an 08 Civic twice, and I rented a Corolla for a couple of days. I test drove the Focus twice and I liked it a lot more than the other cars I drove. I did a ton of research before getting this. I actually traded an 07 Toyota Avalon for this car and it was a great decision. The Avalon was in for rattles twice and still had rattles, and it was in the shop for several days over 2 visits with oxygen sensor issues. Now I'm saving money on gas, insurance, and I actually like my car again. Nice ride, fun to drive, and great stereo.
The sync system is really sweet and works as advertised. The Sirius radio comes in better than the Toyota's XM. Stereo sounds very good. Sporty ride but not as rough as the Civic. Very quiet interior compaired to others in this class.
I'm not really sure. I haven't found anything that I'd change yet.