Although the seats sport long cushions for thigh support and big bolsters to keep you contained, you wouldn't slide far without them given the wall-size center console and door adjacent. Seat controls are manual and limited to forward and backward; there's no lumbar or cushion height adjustment, but the tilt wheel and power adjustable pedals help everyone fit. The pedals are offset to the left a bit and include a dead pedal to brace your left foot on when not shifting, but the floating gas pedal is not ideal for heel-and-toe pedaling.

Leather trims the steering wheel and shift knob, while seats have suede-like center sections with color options; the seat sides and interior are all black. It's not fancy in here, with plastic a frequent surface because it's light, inexpensive, easy to clean, and easy to cut up to add a roll cage, light and radio switching, and so forth.

Dead ahead of the driver is the tachometer, with fuel to the left and speed to the right; the Viper won't run to the top number (220 mph) but it will go well 'round. Some mental recalibration may be in order as most cars are not traveling 110 mph with the needle straight up.

Sloping down to the right of the wheel are oil pressure (closest to line of sight, where it should be), oil temperature, water temperature, and voltage. All instruments are black numbers on white faces and an easy read, although the oil pressure gauge reflects in the windshield at night. The bezels around the gauges may be optioned up in different trim.

In keeping with its strictly (go fast) business attitude, the steering wheel has just one button on it: the horn. And there are no cup holders. You might feel tempted to Zip-tie your commuter cup to a roll bar and run a hose out of it for sipping, through your helmet, of course.

Air conditioning is standard and quickly cools the tiny volume of air space inside, and in warm weather the engine and pipes surrounding you can quickly turn the cockpit into a mild oven. You can now add navigation to the electronic entertainment, but your phone should be stowed; they'd never hear you over the din.

Visibility is relatively good for a low-slung beast. The mirrors aren't filled by the fat rear fenders and although the glass backlight might distort them, sizable objects are easily detected behind. The windshield doesn't blend in to the roof as on some cars, so the forward view upward is marginal; you may need to lean forward and peer up to see traffic lights, and the rearview mirror and right front fender conspire to make a very small area to see what's up and to the right, such as sharp uphill right-handers or merging traffic.

Dodge claims trunk space of 14.6 cubic feet under the large hatch opening, but that seems optimistic; maybe they're including the rear suspension and fuel tank in that figure. That said, the GTS does have enough room for a couple of overnight bags or maybe your helmet and driving suit. There's no spare tire, instead there's a small air compressor and fix-kit; that makes sense because there'd be nowhere to put a massive, flat tire.

The roadster's trunk is notably smaller but it can still hold a wheeled suitcase and carry-on bags. If the top is up there is space behind the seats for jackets and lighter items; this space disappears with the top down but trunk space does not change.

The roadster also comes across as quieter sometimes as it's less of an echo chamber, but it is otherwise similar to the GTS and just 10 pounds lighter.