My review probably won't be as extensive as the others I've ready, however I do want to make one thing clear: this car is almost unbelievable. The amount of swag that Honda packed into this thing for such an affordable price is unprecedented. If you're looking for an everyday commuter that won't drive you crazy in rush-hour traffic, the Si trim may not be for you. This car wants to go fast and is very insistent about it. My only complaint is a "rattle" from the lower portion of the passenger seat. The service folk have at least been helpful in trying to get it fixed, though.
Hard to pick favorites, but I guess the parts under the hood qualify. Powerful while still delivering decent MPG.