Let's start with the talking point: the roof. Pressing a switch next to the gearlever or on the keyfob begins a 12-second opening sequence that can be initiated at any speed.
Smart is also proud of the fact that you can now choose more than just having the roof open or closed. One push of the switch gives a partial roof opening that's essentially an extended sunroof, and a second push wraps the roof over the B-pillar and bunches it behind, together with its integrated glass rear screen. Finally, for the full open-top experience, with the roof in this second position, the Fortwo's roof bars pop out and have a dedicated storage solution in the bootlid.
Roof down and side windows up, only the very tip of your barnet is ruffled, even at motorway speeds. With the roof up at these higher speeds, however, there's quite a bit of road noise that makes holding a conversation hard work. The turbocharger does a good impression of a (very) mini 911 Turbo on-boost, too, but both it and the engine settle down nicely at a cruise.
This engine and gearbox combination work well together. There's decent low-down pull and intelligent enough gearbox software to ensure well-timed self-downshifts in both Normal and the quicker Sport mode. Progress is surprisingly eager even with two adults onboard, even though this is the heaviest of the Cabrios, which, at 995kg, are between 40-55kg heavier than the standard Fortwo.
That said, driving the Fortwo quickly still requires commitment. Manual gear changes via the paddles are quick, but a combination of the Fortwo's very short wheelbase and its relatively quick steering make it feel nervous. There's never enough meat or communication felt through the wheel to build confidence, either.
This arguably isn't really an issue because the Fortwo will spend 95% of its time in cities. Here the light, quick steering and hilarious sub-seven metre turning circle all contribute to making the Cabrio superbly manoeuvrable urban transport.
Manoeuvrable, yes, but in sport suspension-equipped Proxy guise, not comfortable. The low-speed secondary ride is extremely busy, and because large obstructions such as speed bumps are hit by both axles without much pause, a pronounced vertical bounce is sent through the cabin. Some forgiveness could be offered if the Proxy's body felt taut through tight bends, but it doesn't.
There's lots of space for two adults inside and the driver sits relatively high providing good forward vision, but steering wheel and driver's seat height adjustment are both optional even on this range-topping Proxy model. Despite its compact dimensions, the over-the-shoulder view is largely obscured by the Fortwo's rear pillars and roof, too.
Boot space is claimed to be 340 litres roof-up and 260 litres with it down, but the space is hindered by its awkward shape. The cabin is largely solidly constructed and our car sported an attractive array of glossy plastics set against a fabric dash, although it was difficult to ignore some of the cheap-feeling Renault switchgear dotted about the cabin.