I was last Saturday at AMG and had a chance to get a peak on it. 

The car is absolutely stunning. Perfect car for families. 

Only concern - the price is a bit stiff. As AMG we are talking beyond 200k€ - an comparable M6 Convertible is almost half that price. Yes - the Benz is special, but does it give that much more? In power the S63 or M6 is comparable, in driving dynamics the BMW might be even more sporty and in luxury the S will have his head up. Same price, the S would be my winner, but double price I rather would take a BMW.