The Good: The 2007 Honda Civic Si Sedan has a well-integrated navigation and voice command system. Its power train makes it fun to drive, whether you're practicing fast launches or simply commuting. The Bad: Bluetooth cell phone integration isn't an option on the Civic Si, nor is a real iPod adapter. The optional CD changer mounts in the trunk. The Bottom Line: Beyond a couple of missing options in the cabin, the 2007 Honda Civic Si Sedan is as functional as it is fun. Its cabin tech is both useful and entertaining, while it offers an enjoyable driving experience.