I've had some experience with the engine, albeit not in the GT body.
I've driven a GT and it felt more akin to an American muscle car than a Germanic sports car. From speaking with owners and reading reviews, for road use and all around appeal, the 'C' version seems the ideal package; however, the price point of the standard GT makes them look more and more appealing. The R is a superb looking vehicle but I think the set-up would grow tiring on our roads.
With that said, and without my rose-tinted Morgan Aero specs on, having spent 4-hours in convoy with one a few weeks back, I couldn't help but feel the looks were a little too 'every-car' and I wish they'd continued the SLS design language to distance it from other Mercedes and sports cars as a whole.
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