More of a mighty cruiser than a sports car but none the worse for that, and we love the engine's ferocious growl
Lots of seat adjustment and the sensible layout you'd expect in a BMW
Enough electronic safety kit to soothe the most anxious traveller; security kit is good, too
BMW has a good record for reliability and the car looks and feels beautifully put together so we wouldn't fret
You and a pal are fine up front but the back seats are best for kids or tall items of luggage: the boot is a fair size but shallow
Plenty of goodies including heated electric leather seats and sat-nav, but surely the wind deflector shouldnt cost extra?
Theres a firm edge to the ride at town speeds, but it smoothes out when you go faster and is superb at a motorway cruise.
The 6 Series Convertible also benefits from strong grip and tight body control in corners, although it's too big and heavy to feel like a sports car, even in the most driver-focused, M Sport spec.
BMW offers a 3.0-litre diesel model (misleadingly badged 640d) that combines gutsy performance with around 50mpg. Alternatively, if you believe petrol power is a must in a convertible, theres a 3.0-litre turbo (the 640i) and a 4.4-litre twin-turbo (the 650i).
The fabric hood is good at keeping out unwanted noise, but some other convertibles are better at protecting occupants from roof-down buffeting. Its also disappointing that a wind deflector costs extra given the high price of the 6 Series.
The cabin is beautifully trimmed, and the dashboard has the same orderly layout as most other modern BMWs.
Theres no shortage of space up front, but limited legroom means the back seats are best left for children. Adults can just about squeeze in, but for short journeys only.
More positively, the boot is long and wide if a little shallow and every 6 Series comes with heated, electrically adjustable leather seats, climate control, satellite-navigation and automatic lights and wipers.
The 6 Series was too new to be included in the most recent JD Power customer satisfaction survey, but BMW as a brand finished in the top half.
Safety equipment is fairly comprehensive, with every 6 Series Convertible getting four airbags, a rollover protection system and stability control. You also two sets of ISOFIX mounting points in the rear and a front passenger airbag deactivation switch that lets you mount a rear-facing child seat beside you.
Other luxury convertibles - such as the Jaguar XK - are more fun to drive, but the 6 Series is one of the best cruisers. As long as youre not hoping to fit lanky teenagers in the back on a regular basis, its worth considering.