The Cobalt is quiet and refined for a small car.Built on a strong, stiff platform, it delivers crisp handling and a smooth ride.

If you're looking for inexpensive, high-value transportation with a new-car warranty, the Cobalt is worth a look.Premium features are available like heated leather seats, XM Satellite Radio, MP3, and OnStar.

The SS models offer a dynamic driving experience.Driving the SS Supercharged model is an absolute hoot.Quick, responsive handling and brisk acceleration performance along with a sporty-sounding exhaust note make the supercharged coupe entertaining to drive, a sport compact that can more than hold its own in the class.

New for 2007, the 2.2-liter and 2.4-liter Ecotec engines get slightly more power.A remote vehicle starter is available on models with an automatic transmission ($190).Standard equipment has been upgraded to include AM/FM stereo with CD and auxiliary input jack and three-spoke steering wheel.An AM/FM stereo with in-dash six-CD player and MP3 playback is a new option for 2007.A new exterior color option is Sport Red Tintcoat.Special 16-inch high-vent steel wheels are now available on the LT model and 18-inch polished wheels are available for the SS Supercharged coupe.

The LS, LT, and LTZ models are powered by a 148-horsepower 2.2-liter engine and use the FE1 suspension.

The LS ($13,790) sedan and coupe come standard with air conditioning, cloth upholstery with height-adjustable front seats and a 60/40 split fold-down rear seat, automatic headlights, electric rear defogger, tilt steering column, CD player with auxiliary jack, and a driver information center.LS models come with wind-up windows and manually operated mirrors, front disc/rear drum brakes, and 15-inch wheels and tires.LS models have a body-color grille and door handles.They offer a choice of five-speed manual or optional four-speed automatic ($850).

The LT ($14,910) sedan and coupe get power windows and door locks, anti-lock brakes, 16-inch alloy wheels.LT comes standard with a five-speed manual or optional four-speed automatic ($850).The LTZ sedan ($18,790) is a premium model that comes standard with the automatic transmission, along with upgraded audio and premium trim.

SS ($18,210) coupe and sedan get a 173-hp 2.4-liter engine, the FE3 sports suspension, 17-inch wheels and high performance tires.SS also gets upgraded cloth, special body-color trim and other upgrades.SS models are available with the five-speed manual or four-speed automatic ($850).

SS Supercharged coupe ($21,110) features a 205-hp 2.0-liter engine, the high-performance FE5 suspension, and 18-inch wheels with high-performance tires.

Options include power sunroof ($750); OnStar ($695); XM Satellite Radio ($199), a rear spoiler ($275), in-dash 6CD player and MP3 ($295).The Sport package ($595) includes a brushed metal trim package for the dashboard, white-faced gauges, leather-wrapped steering wheel and shifter, rear spoiler and 16-inch alloy wheels with Pirelli tires.

Safety features include dual-stage front air bags, front seatbelt pre-tensioners, rear center shoulder belts, and the LATCH child seat retention system.All but LS come standard with anti-lock brakes (ABS).Head curtain side air bags ($395) designed to provide head protection are optional.OnStar is a good safety feature because operators will direct emergency crews to your exact location should your airbag go off and you fail to respond.

Body panel fits are extremely tight.So tight, in fact, that there are no rubber trim gaskets around the compound complex headlamps.

The coupe bears a resemblance to the Cavalier it replaced, though it shares nothing else with it.The sedan features a more modern roofline sweep.The SS coupe and sedan models have a small rear spoiler, while the SS Supercharged coupe carries a huge, tall rear spoiler than says it's a serious sport compact.

Cobalt is longer, wider and lower than most of its direct competitors and its interior dimensions and trunk capacity are comparable for the class.

Cobalt uses different seats in the different trim levels, each with detail changes in foam, padding and trim.We found plenty of fore/aft and rake adjustment for a 6-foot, 4-inch driver, plus seat height adjustment with a ratcheting handle.The LT seats were very comfortable and grabbed us in the fast corners exactly where we needed to be grabbed and held.Even better were the leather-trimmed seats in the SS Supercharged.

The available Pioneer seven-speaker sound system with the Delphi AM/FM/CD and XM Satellite Radio delivers good sound and includes a huge subwoofer mounted on the left side trunk wall.

The heating, ventilation and defroster system worked quickly and intuitively.

The LS comes with manually operated windows.We don't mind this, but it takes a lot of cranks (about four and half) to wind the windows up.The urethane steering wheel that comes on LS and LT models feels cheap.The leather-wrapped wheels on LTZ and SS models are much nicer.

The sedan trunk is wide and deep with a low lift-over height, and almost 14 cubic feet of capacity, more than competitive in the class, though the opening to the trunk seems relatively small.Cobalt does not use space-eating gooseneck hinges on its decklid, opting instead for simple outside corner hinges and two hydraulic assist struts.The coupe has a small trunk opening, making it difficult to fit a thick suitcase.A 60/40-split, fold-down rear seat with a trunk pass-through feature adds utility to both sedan and coupe.

If you want driving excitement, however, you'll want to step up to the SS models.

We drove an LT with ABS and four-wheel disc brakes and found them to be powerful and progressive, with a good ratio between pedal travel and braking action.The brakes seemed a little mushy on the LS, which comes with rear drum brakes.

The 2.2-liter engine, which is rated at 148 horsepower, was a bit of a disappointment.It was smooth, but never felt truly powerful until it was revving very high.The four-speed automatic doesn't help, with kickdown that reminded us of a rental car.

The supercharged engine in the Cobalt SS Supercharged was another story.We like the way it sounded when it revved and, paired with the manual gearbox, it offered responsive performance.

NewCarTestDrive.com correspondent Jim McCraw reported from Dearborn, Michigan, with Mitch McCullough reporting from Los Angeles.