Have been driving an M37 for the past two and a half weeks across the united states and have been very impressed by it. The styling is very much to my taste, and the interior is very well laid out and put together. For me the key to appreciating this car is to take it on its own terms. Instead of comparing it with an E-Class and 5-Series, you are probably better looking at it as a cut price alternative to something exclusive like a Maserati quattroporte. Interior space is very generous, including plenty of boot space. The ride and handling are very good too, almost being as good as a jaguar XF. The engine is responsive, quiet when you want, but vocal and meaty if you rev it more. Fuel economy is surprisingly reasonable if you keep it in the Eco setting (27mpg imperial over 2500 miles, which is around 32mpg in the UK). I drive a 2010 vauxhall Corsa automatic normally and fuel economy is similar! The killer in the UK of course would be the annual rod tax, but if you are only intending on doing longer journeys or owning one as a second car then perhaps it could still make sense. Overall the M37 is a very impressive car, and if I lived in north America I would happily own one. With the price of petrol in the Uk and the annual road tax rate I wouldn't own one at home. However, if you can live with those costs this really is a much better car than many of the reviews suggest.
Fredrik Rich, West Yorkshire, June 27th 2012