The Lexus IS 350C is a four-passenger retractable-hardtop convertible. Power is supplied by a 306-horsepower 3.5-liter V6 and is sent to the rear wheels through a six-speed automatic transmission. It's loaded with all the expected premium amenities, including dual-zone automatic climate control, keyless ignition/entry and eight-way power front seats with easy rear-seat access at the touch of a button. Pop-up rear rollover bars add an extra margin of safety, as do front and rear side curtain airbags, a rarity among convertibles. Major options include a 12-speaker Mark Levinson surround-sound audio system, a navigation system, adaptive cruise control and heated and ventilated front seats., , In reviews, our editors have lauded the Lexus IS 350C's coupelike isolation with the top up, and we've also given high marks to its luxurious interior. The backseat is quite cramped, however, and while trunk space measures nearly 11 cubic feet with the top up, that shrinks to a measly 2.5 cubes with the top stowed. On the bright side, one golf bag will still fit with the top down, but don't expect to add anything else., , On the move, the IS 350C's handling is competent, and the ride is supple as long as you stick with the standard 17-inch wheels. Acceleration is also quite quick thanks to the strong yet still smooth V6. Overall, the IS 350 convertible's relaxed demeanor, sharp styling (except for that bulbous rear end) and Lexus' typical high-quality craftsmanship results in a very composed and classy way to enjoy the scenery.